Bash

Great Reads

How to Change Text Color in a Linux Terminal

by Chris Maunder

A quick overview and a simple bash script to make your script output a little more lively

Proper Bash Scripting on Windows: Associate SH Scripts to WSL (Windows 10) (Enable drag-and-drop to .sh) (+other Linux Executables)

by Alex the Green Apple

Guide to properly set up Windows 10 for Shell scripting

Create, Connect and Add Custom Domain to WordPress Bitnami Ready-to-Run Virtual Machine in Microsoft Azure

by Ahmed Khateeb

In this article, I will describe how to Create WordPress Bitnami VM, how to connect to VM, how to add Custom Domain to that VM and important steps to follow after fresh installation.

Effective Shell Part 1: Navigating the Command Line

by Dave Kerr

Text in the command line can quickly get unwieldy. Here are some simple tricks you can use to navigate in the command line.

Latest Articles

How to build FFmpeg 7 from source and what you can do with its new features

by V. Subhash

Compile FFmpeg v7.0 CLI from source and check out some of its new features

FFmpeg Filters Every Youtuber Needs

by V. Subhash

A simple fix for excessively bright video and low-volume audio

Change Default Crontab Editor in bash shell for Raspberry Pi

by ToughDev

This post shows a way to change the default crontab editor in bash shell for Raspberry Pi.

How to Compile FFmpeg 6.0 in Linux and What New Things Can Be Done With It

by V. Subhash

How to get compile the latest FFmpeg source code and try out some new features

All Articles

top

Bash

How to Change Text Color in a Linux Terminal

7 Apr 2022 by Chris Maunder

A quick overview and a simple bash script to make your script output a little more lively

Linux

terminal

Bash

color

Proper Bash Scripting on Windows: Associate SH Scripts to WSL (Windows 10) (Enable drag-and-drop to .sh) (+other Linux Executables)

28 Jun 2018 by Alex the Green Apple

Guide to properly set up Windows 10 for Shell scripting

Create, Connect and Add Custom Domain to WordPress Bitnami Ready-to-Run Virtual Machine in Microsoft Azure

25 Oct 2016 by Ahmed Khateeb

In this article, I will describe how to Create WordPress Bitnami VM, how to connect to VM, how to add Custom Domain to that VM and important steps to follow after fresh installation.

Effective Shell Part 1: Navigating the Command Line

11 Jun 2017 by Dave Kerr

Text in the command line can quickly get unwieldy. Here are some simple tricks you can use to navigate in the command line.

Python

Node.js

Bash

Effective Shell Part 2: Become a Clipboard Gymnast

25 Mar 2018 by Dave Kerr

In this article, I'll show you how you can use the shell as an efficient tool to compliment how you use the clipboard.

shell

Bash

Shell Programming Secrets Nobody Talks About (Part 2)

6 Mar 2023 by V. Subhash

This final part of the article series covers some other important behaviour of bash, particularly that relating to text expansions and substitutions.

shell

Bash

script

FFmpeg Filters Every Youtuber Needs

5 Nov 2023 by V. Subhash

A simple fix for excessively bright video and low-volume audio

IS PYTHON a Replacement for a Linux Shell? Is it a SHell language?

24 Aug 2013 by Zoltán Zörgő

As Mehdi Gholam stated, it is a programming language and it can be used as shell, but it is quite inconvenient as such. It can be a shell because it has an interactive interface, but it is inconvenient because the main shell commands you normally use in a shell are method calls, it won't let you...

shell

Python

Bash

c# execute DOS command and store the results

7 Oct 2014 by Sergey Alexandrovich Kryukov

This application should not be in C:. Do you know that a system does not even have to have drive C?!And this is not a "DOS command". In modern OS, there is no such thing.Simply use System.Diagnostics.Process.Start with redirection of...

Bash

command-line

script

c# execute DOS command and store the results

7 Oct 2014 by Maciej Los

Why to torture yourself by sending some command to the 'command prompt'?Isn't better to use .net classes, objects?Please, see:Network Programming in the .NET Framework[^]NetworkInterface Class[^]Quite often used alternative is WMI[^], which provides functionality to get information...

Bash

command-line

script

What does : mean in the variable assignment bash?

4 Mar 2018 by OriginalGriff

See here: : colon command for bash - Super User[^]

Bash

What does scan -a 0 -C command will do?

12 Jun 2018 by Jochen Arndt

It is never a good idea to execute an application when not knwowing what it does (especially by passing command line options). Do such at least as normal user and not as root. With many applications there is a man page installed too. So you should first try if such is available: man scan and...

Linux

Bash

Automate C program standard inputs with bash

20 Apr 2021 by k5054

When you use a Here Document, the shell effectively does echo -e "1\n2\n" > /tmp/tempname ./test

shell

Bash

How to Use FFmpeg Filters to Jazz Up Your Audio and Video Files

21 Jun 2021 by V. Subhash

Cut, copy, convert, mix, rotate, flip, resize, crop, combine, compose, blur, sharpen, smoothen, side-by-side split, PIP inset, fade in/out using FFmpeg Filters

Bash script backup locally then copy to network share

N 14 Apr 2024 by Pete O'Hanlon

This is the type of question that you could probably get answered using something like ChatGPT or Google Gemini. You have the information you want in your question, so what you need to do is write a prompt that will give you a suitable answer....

MySQL

Bash

script

Scheduling a job in server

20 Jan 2012 by Sergey Alexandrovich Kryukov

Use cron or Unix at, please see:http://en.wikipedia.org/wiki/Cron[^],http://en.wikipedia.org/wiki/At_%28Unix%29[^].—SA

IS PYTHON a Replacement for a Linux Shell? Is it a SHell language?

24 Aug 2013 by Mehdi Gholam

Python is a programming language : http://en.wikipedia.org/wiki/Python_%28programming_language%29[^]However it can be used within a shell.

shell

Python

Bash

Bash script that detects if a file is the correct size

23 Jun 2015 by Richard MacCutchan

It is some time since I wrote any bash scripts but I think you may need something like:#!/bin/bash# find all .gz files of 10k since yesterday, and count themcd COUNT = `find . -name "*.gz" -size -10k -mtime -1 -print | wc -l`if [ $COUNT -eq 0...

How to overwrite variable value in linux

25 Apr 2016 by Richard MacCutchan

s1= more /home/mohsin/Desktop/system_usage_bash_file | grep TIME | awk 'BEGIN {FS=","} {print $3}'As far as I remember shell scripts, you need to put the command in back quotes thus:s1= `more /home/mohsin/Desktop/system_usage_bash_file | grep TIME | awk 'BEGIN {FS=","} {print...

Linux

shellscript

Bash

Please identify what this is intended to do

22 Feb 2017 by Albert Holguin

So, that doesn't appear to be valid bash code, starting a line with "58..62" is invalid, as it's not a command or shortcut... but if it's pseudo-code I'd guess it's attempting to run nslookup on a range of IP addresses.This gets you the same thing that your code appears to be attempting to...

Linux

Bash

Need to convert small bash script to PHP

4 Apr 2018 by Jochen Arndt

When you need to include a double quote within a string, you have to escape it as described at PHP: Strings - Manual[^]: exec("sudo tshark -n -r $filename -R rtp -R \"rtp.ssrc == $ssrc\" -T fields -e rtp.payload | tee payloads"); The for loop requires understanding the bash commands: BASH...

PHP

Bash

Bash script - when to use command substitution and when redirection ?

21 Sep 2018 by Richard MacCutchan

OK, to continue from my earlier message: 1. "Yes, I did try "redirection" but it did not work as expected." This is one of the most frustrating comments that we see in a question. We have no idea what you did expect to see or happen. And we have no idea what did happen. Without a clear...

Bash

scripting

Append key to json object with jq

1 Aug 2020 by cats n dogs

Hello, i have a list of keys on which i iterate and each time they current is not found in the json object i want to append it to the object. What I have tried: Here is what i have done so far https://jqplay.org/s/risDCfxm5j The problem is...

Javascript

Bash

JSON

Append key to json object with jq

1 Aug 2020 by p e a k

The key is reduce. The following variant of your jq program produces the output shown below: reduce ("secrets","toto","test") as $k (.; if index($k) | not then . + {($k): $k} else . end) Output: { "config-maps": [ { ...

Javascript

Bash

JSON

[Shell script] parse through text file, search on matching values

24 Mar 2021 by k5054

Problem one seems to be a mix of UTF-8 and ASCII quotation marks (") in your code -- assuming you did a cut&paste from your source. Next, your logic is slightly off. You break the while loop and report no matches on the first non-match. One...

Scheduled crontab to echo a basic command to /home/user. The job is not showing in the user's home folder?

16 May 2021 by Peter_in_2780

You probably don't have write permission in /home/otherUser/ , so your attempt to create the file will fail. Check /var/log/syslog for error messages from cron.

Bash

[BASH] speed test via CLI w/ no addon

18 Jul 2021 by Daniel Pfeffer

Working backwards from the numbers that you give, we get 1 block = 100Mb / 22355 = 4473 bits. This looks close to a 4 Kb (i.e. 512 byte) block size. Adding various header and framing bits make the correspondence even better. I expect that you...

[BASH] remove a portion of a string and store it I a new variable

13 Oct 2021 by Peter_in_2780

date2=$(echo $date1 | awk '{print $1 " " $2 " " $4}')

macOS

Linux

Bash

[BASH] store UNIX epoch time in variable

16 Oct 2021 by Peter_in_2780

cert_expiration_epoch=$(date +%s -d "$cert_expiration") You really should start using the basic tools available. date --help man date man bash Also as someone else already told you, it's much better to use $(command) rather than `command`

shell

Linux

Bash

[BASH] passing a variable in CURL

1 Nov 2021 by Richard MacCutchan

It is because of the uncontinued blank line and the single quotes around $password. The following works*: curl "https://somewebsite.com" \ --request POST \ --header "Accept:application/json" \ --header "Content-Type:application/json" \ --data...

Bash

cURL

JSON

Storing a folder path with a space as a variable

2 Dec 2021 by OriginalGriff

Answered only to remove from unanswered queue - solved by OP.

macOS

Linux

Bash

[Solved] how can we do "continuing lines" in windows terminal/cmd like in linux

25 Apr 2022 by OriginalGriff

It's the "^" character, but it must be the last character on the line: it can't be followed by a space or anything else. Try it: WINKEY+R, "cmd" ENTER "cd^" It will respond "More?" "\" ENTER The current directory will chance to root. Yes, it...

Bash: compare two number read from txt file

26 Jul 2022 by k5054

You can use normal comparison operators inside a bash [[ ]] expresion. Try if [[ $line > 30 ]]; then ... fi

How to Compile FFmpeg 6.0 in Linux and What New Things Can Be Done With It

8 Mar 2023 by V. Subhash

How to get compile the latest FFmpeg source code and try out some new features

Linux

ffmpeg

Bash

Updating bash Variables in a Loop

8 Mar 2023 by k5054

How to update a bash variable inside a loop when reading from command output

shell

Dev

Bash

Change Default Crontab Editor in bash shell for Raspberry Pi

7 May 2023 by ToughDev

This post shows a way to change the default crontab editor in bash shell for Raspberry Pi.

Raspberry-Pi

Bash

Regex pattern for lowercase alphanumeric, hyphen and dot

4 Sep 2023 by Richard MacCutchan

Try this one: [a-z\-\.]+ You can test regexes online at https://regexr.com[^]

Regex+

Bash

Sqlite inb bash if insert data, tell me not have table

8 Feb 2024 by k5054

Are you sure you have the BinanceCex table in the SQLite file ConfigDB.db? Check your db file $[k5054@localhost]$ sqlite3 ConfigDB.db .schema CREATE TABLE BinanceCex( id int, ... ); CREATE TABLE StampExchange( ... ); $[k5054@localhost]$ Are...

Bash

How can remove comma in bash

18 Feb 2024 by OriginalGriff

Use string replace: How to Replace Substring in Bash Natively[^] The string to search for: ",] The string to replace it with: "] If the "spare comma" is there, it'll be removed. If it isn't, the string will be unchanged.

Bash

Bash return error in cile for ...why ?

23 Feb 2024 by Richard MacCutchan

See https://stackoverflow.com/questions/30358065/syntax-error-bad-for-loop-variable[^]

Bash

Python bash create signature not correct

31 Mar 2024 by k5054

You bash script already seems to print out the URL it sends in send_request(), but I can't see that your python script does the same. The first thing I would do, is get the python script to print out the URL and compare. If you want to see...

Python

Bash

How to build FFmpeg 7 from source and what you can do with its new features

U 12 Apr 2024 by V. Subhash

Compile FFmpeg v7.0 CLI from source and check out some of its new features

Bash

ffmpeg

multimedia

Bash script backup locally then copy to network share

N 14 Apr 2024 by OriginalGriff

This isn't a "code to order" website - I suggest that if you can't do it for yourself (and are unwilling to learn how) you try somewhere like Freelancer.com - but be aware: you get what you pay for. Pay peanuts, get monkeys.

MySQL

Bash

script

Need to access a server to copy data.

31 Dec 2011 by TorstenH.

http://www.tea...

Need to access a server to copy data.

31 Dec 2011 by Graham Breach

Do a search for "ssh certificate based authentication" - as long as it is enabled, key-based authentication should allow you to use scp between trusted hosts.

Scheduling a job in server

20 Jan 2012 by Be Yourself

I have a java class to be scheduled in the server to be run in a specified time .Can any one help me how to schedule a execution of a java class in server .I have tried goggling for it but I didn't find any fruitful results.The server is apache server.

Run a jar file on server.

29 Jan 2012 by Be Yourself

I have a jar file named main.jar with the Manifest entry as:Main-Class : tss.ReportClass-Path : lib/Classes12.jar lib/xlist.jar lib/axis2.jarnow I have the lib folder in the same directory as that of the jar file and I am able to run the jar also from command prompt by using "java -jar"...

How to use printf and bash I/O redirection

11 Mar 2012 by zhaoyilong1

My program runs very similar like "cat" command in shellbut I failed to print the messages to file when I try to use dog Hello > inputfileIn my code , I only use printf to print the messages, it works when the stdout is screen, but fails when I try to output to a file..I think...

Bash

Bash Variable and Sed Help

7 May 2012 by Sicppy

I am making a sort of Stereotypical english to russian translator, when I do: read -p 'Wanna learn russian? Type in an english phrase!: ' ENGecho $ENG | sed 's/ //g'It echoes the sentence perfectly fine with no spaces in the sentence. But when I try to do this:read -p 'You wanna learn...

Bash Variable and Sed Help

7 May 2012 by Sergey Alexandrovich Kryukov

Out of curiosity, I tried to see how your sample phrase is translated into Russian, in your original form (slightly fixed) and also its equivalent in formally correct English:Wanna learn Russian? Type in an English phrase!orDo you want to learn Russian?Type in an English phrase!and...

Bash Variable and Sed Help

8 May 2012 by Hex01

Instead of:ENG=$ENG | sed 's/ //g'try:ENG=`echo $ENG | sed 's/ //g'`Note that this uses back-quotes after the equal sign and the last character.

How do I rewrite this bash command line into zsh?

4 Feb 2013 by coffeenet

HiI need to input this command, it is written in bash, but I my terminal is zsh. How do I rewrite it?ssh username@rserver.com -L 127.0.0.1:8888:*:11111Thanx!

Linux

CommandBuilder

Bash

IS PYTHON a Replacement for a Linux Shell? Is it a SHell language?

24 Aug 2013 by Sandra McGarry

I'm getting mixed answers, is Python a shell or isn't it? Python seems easier to understand than Bash but Bash is a "Shell" for Linux. I'm writing a paper about Linux Shells and am confused on this point. I need an answer rather quickly please. Thanks in advance for any help.

shell

Python

Bash

IS PYTHON a Replacement for a Linux Shell? Is it a SHell language?

25 Aug 2013 by AjithKp560_

Python is not a shell. It is programming language. You can program many exploits using this programming language. So, the exploits that will spawn control over remote computers are also called as "SHELLS". Like this you can program exploits using perl, ruby, php like programming languages......

shell

Python

Bash

How can I separate some repeated patterns in a row into multiple rows using bash script?

12 Oct 2013 by Member 10272533

I have some problem with bash script.I've got a string which has some repeated patterns like this.1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 ...Each fields is separated by tab key.I want it to look like this...1 2 3 41 2 3 41 2 3 4...How can I solve this problem using bash...

Linux

Bash

script

How can I separate some repeated patterns in a row into multiple rows using bash script?

14 Oct 2013 by 101zeeshan101

You can use sed like this:Solution:s='1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4'p='1 2 3 4'echo "$s"|sed "s/$p\s*/&\n/g"1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4You can use infinite while loop and use the input file and iterate through each line to use this logic for murtiple lines.Live...

Linux

Bash

script

Linux run process in BG

21 Oct 2013 by Andreas Gieriet

The task sounds non-sense to me.Running a process in background means:the stell starts that command as background process (fire and forget) and immediately continues with the next command.I.e. this completes instantly:sleep 100 &echo "done"You may observe the sleep process by...

shell

Linux

Bash

How Can I Check My Application Is Running In Ios Simulator Using Bash Script

21 Jan 2014 by Member 10066562

i am working in iPad application automation. Now i am facing a problem that how can i check that my application is running that is automate in iOS Simulator(iPad/iOS 6.1) using bash script. My OS is Mac OS X (Version: 10.7.5). Please help.

How to send an email with attachment using cygwin

24 Jun 2014 by Maciej Los

Have a look here: Sending Emails with Attachments from the Command Line Revisited [^]As per i understand you need to install 2 packages (Email and MTA). After configuration, you'll be able to send email with attachment(s).

Bash

How to run an script using cron in Windows 7 using cygwin?

26 Jun 2014 by Alexander24

I have installed all the dependencies in cron. My scripts are working properly, and also I have tested cron which I think works properly as well. However, I would like to set up a task to run a script file. Here is where I need help, please can anyone provide me some help? Here is cron code: My...

Bash

List only common parent directories for files

12 Sep 2014 by nikuuul

I am searching for one file, say "file1.txt", and output of the find command is like below./home/nicool/Desktop/file1.txt/home/nicool/Desktop/dir1/file1.txt/home/nicool/Desktop/dir1/dir2/file1.txtIn above cases I want only common parent directory, which is "/home/nicool/Desktop" in above...

List only common parent directories for files

12 Sep 2014 by DaveAuld

I think this answers your question.http://stackoverflow.com/questions/12340846/bash-shell-script-to-find-the-closest-parent-directory-of-several-files[^]

How do I redirect the welcome message while SSH to a linux server to a file ?

19 Sep 2014 by Anand Shaw

Hi,I want to store welcome message to a file when I do SSH to a unix server.Please tell me how can I redirect the message to a file.Thanks.

Linux

Bash

How to find the password expiry information without /etc/shadow file access ?

19 Sep 2014 by Anand Shaw

Hi,As a user to a linux server, I don't have access to shadow file. But I want to find out password expiry details for my username.Thanks.

Linux

Bash

How do I redirect the welcome message while SSH to a linux server to a file ?

19 Sep 2014 by Richard MacCutchan

cat /etc/motd > somefilename

Linux

Bash

c# execute DOS command and store the results

7 Oct 2014 by Jaxam

In a command prompt I can type "ipconfig" and a list of internet information will appears. I want to do this in a C# console program. Basically, I want to run the C# program and I want to read and store everything that is given in "c:\ipconfig"."ipconfig" is a String in which that I can set...

Bash

command-line

script

HDD blank sectors counter - how to? (which language?)

4 Nov 2014 by Robert-68

Hello friendsit is too long time I don't code :-(I'm landed today on this cool community.I need realize (or thank you if you want to provide one) an utility that would count how many blank sectors (blank is meant that for the given sector, each of the 512 bytes is x00) are present in...

Python

Bash

How do I sed to retrieve URLs within single quotes?

10 Nov 2014 by Member 10440553

How do I sed to retrieve URLs within single quotes?Currently, it can only retrieve URLs which starts with HTTP/HTTPS.urls=$(sed -ne 's/.*$http[^"]*$.*/\1/p' 's/.*$https[^"]*$.*/\1/p' /url/to/path)

How do I Show a Bash Result in HTML

11 Nov 2014 by Member 11224763

Hello,I have a project where I have to show the current temperature on a website.I already created a script in bash that "echo" me the current temperature, but I don't really know how to display that result on my website.Sincerly,Yvan MLS

HTML

Linux

Bash

How do I Show a Bash Result in HTML

11 Nov 2014 by Dominic Burford

There may be other ways of doing this, but you could consider using the XMLHttpRequest object as in the example below.xmlhttp=new XMLHttpRequest();xmlhttp.open("GET","temperaure.txt",false);xmlhttp.send();document.getElementById("temperature").innerHTML=xmlhttp.responseText;

HTML

Linux

Bash

Does WebHDFS support HAR?

29 Jan 2015 by fausthsu

Does WebHDFS support HAR access?I'm programming a remote control script, and I've searched a lot and made some test, seems it does not?thanks.

Bash

Printing out the statistics of commands in terminal - bash (no awk or sed)

28 Apr 2015 by Member 11649315

Tried finding an answer on stackoverflow but can't. All answers were with awk and sed which I'm not allowed to use! So once again, I ask you to help me.Basically I need to write a script that prints out the history of all used commands in the linux terminal. The commands are saved in a file...

Linux

Bash

Printing out the statistics of commands in terminal - bash (no awk or sed)

28 Apr 2015 by Richard MacCutchan

It's a while since I did much bash scripting but you probably need to start by passing the file through sort, to get the commands in sorted order. Pass the sort output to uniq which, I think, has an option to count the lines. Check the man pages of each command for the applicable options.

Linux

Bash

Linux replacement command by index

26 May 2015 by Member 11612625

stuck. very stuck. why? because i can't figure out a replacement command that works by giving an indexwhat i'm doing now is: rpl "oldstring" "newstring" "filename"ofcourse this changes all the search results. what i need is something like this: rpl "index" "newstring"...

Linux replacement command by index

26 May 2015 by _Asif_

I have not tried it myself but it seems that this could help you out[^]

How to curl_multi_perform from /usr/bin/curl process in bash on OS X?

2 Nov 2015 by Member 10308543

Hey guys,I am working on an Illustrator extension project which uses HTML5 for UI and JavaScript for implementing functionalities.Apart from HTML5 I am also using JQuery and AngularJS.Illustrator SDK has an special feature where you can execute a process using it.I need to pack a PDF...

training of lbp classifiers sometimes succeds and other times not

11 Nov 2015 by Member 12131950

I have the following directory strucure: project root/ negatives/ the negatives files ngest/ 00palmo/ 1510 positives files 01pugno/ 1431 positive files 02indice/ 1073 positive files 03v/ ...

OpenCV

Bash

How to overwrite variable value in linux

16 May 2016 by Member 12485314

i want to overwrite value of variable s1 from "abc" to ---> [more /home/mohsin/Desktop/system_usage_bash_file | grep TIME | awk 'BEGIN {FS=","} {print $3}']but when i echo i get "abc" on both echos,means it is not overwrittenWhat I have tried:#!/bin/bashs1="abc"s2="USED"echo...

Linux

shellscript

Bash

Need to strip the beginning ./ characters in a function

23 Jul 2016 by magic_owl

for f in ./*.mp3; do sox "$f" "${f%%.mp3}processed.mp3" silence 1 0.02 1% -1 0.02 1%; doneThis is a script I'm using to process audio files. The problem is that it keeps going in a loop, processing the new audio files as well. I'd like to fix this by having the output go in a subfolder, so I...

Bash

I am having trouble getting bash to match my regex

29 Sep 2016 by Member 12767270

I am learning bash scripting and I am trying to understand how regex works with bash. In my simple program, I have a file of various different lines but want to match a simple int pair with the format of the two numbers separated by a comma and a space as so: 123, 123. I also want to match the...

Bash

Please help me.....i am facing an error with my bash code

3 Oct 2016 by Member 12773538

I have a bash script to login into one of my storage device and execute couple of commands and saves output into one text file. Here's the code.plink.exe -ssh root@10.10.10.10 -pw password1 "storage-controllers" >> Cluster1_%date:~-4,4%%date:~-7,2%%date:~-10,2%.txtecho. >>...

Bash

Redirecting shell output via grep

23 Nov 2016 by Alexander Mills

I have a node.js script and I want both stdout and stderr to go to a log file, but I want to pass the stdout and stderr through grep first.This works: node a.js > a.log 2>&1But this doesn't:node a.js | grep "error" > a.log 2>&1It doesn't output anything to the file, but worse...

shell

Node.js

Bash

Redirecting shell output via grep

23 Nov 2016 by Jochen Arndt

Just redirect stderr to stdout before piping to grep:node a.js 2>&1 | grep "error" > a.log When using bash, there is a shorthand for the above:node a.js |& grep "error" > a.log With |&, stdout and stderr of the first command are piped to the second. See the Bash Reference Manual[^].

shell

Node.js

Bash

Error in bash scripting linux for terminal based game

22 Dec 2016 by Member 12917493

Hello everybody,I have been working with Debian for a couple of months for school and because it seems really handy to work with. but now I want to make a game for in the terminal. A Higher or Lower card game (also for school but I wanted to make it before I was given this task). You have to...

Linux

Bash

scripting

Error in bash scripting linux for terminal based game

22 Dec 2016 by Jochen Arndt

I did not checked all the code but this looks suspicious:if [ "$score" -ge 1 ]; then Number=$(($RANDOM % 52)) Gokkaart=${KAARTEN[$Number]} oldNumber=$Number echo "De kaart is $Gokkaart2"fiYou are assigning a new random number to $Number. So the old number is no longer...

Linux

Bash

scripting

Please identify what this is intended to do

22 Feb 2017 by Patrice T

Quote:58..62A simple search in bash reference manual gives the answer.Since we are not a free search service, you will to find the answer by yourself/1) find Bash reference Manual2) search ".."Advice: If you want to avoid rude answers in future, do at least basic researches before...

Linux

Bash

Multithreading curl commands in bash

5 Apr 2017 by Testieaccou

here is a shell script which takes domain and its parameters to find status code . this runs way faster due to threading but misses lot of requests. if i ran normally it process all requests but the speed is very low. is there a way through which speed is maintained and it also not misses all...

cURL

Bash

Bash - sort numerically

12 Aug 2017 by Rev7

I have a file with the following content 1,000 2,0001 300 4 I am trying to sort it numerically. What I have tried: sort -n filename sort -g filename

Linux

Bash

Create a Parrot Drone Web Control Panel: Sound On/Off, Lights On/Off

17 Aug 2017 by D4rkTrick

How to create a web control panel for sound and lights for your Parrot drone (Wi-fi connected)

Need to convert small bash script to PHP

4 Apr 2018 by User 13204940

Hi, I found a small bash script to do exactly what I need but I tweaked a few things. Now I've realised I need this in PHP instead. Would anyone mind helping me convert this to PHP please? I've done some parts, but with the "==" parts I'm not sure how that works out. ssrc=$(tshark -n -r...

PHP

Bash

Create just a window frame

4 May 2018 by Member 13811640

Hello, I am new to Xlib, so don't know pretty much all of it. :D I would like to create a window frame across the screen, just that, just a window frame (something like the border of the marquee when you select with the mouse). I like that window frame to show up on the screen, let's say in...

Linux

Xlib

Bash

Linux bash provide arguments to pdfunite

22 May 2018 by lukeer

Hi forum, a bash script I wrote behaves unexpectedly (read: "There's a bug in it.") and I just don't get it. Say there's that variable PAGES which contains " page0.pdf page1.pdf page2.pdf". And there is $1 which contains "result.pdf". I want to merge all those single-page pdf files into one...

Linux

arguments

Bash

Bash script - when to use command substitution and when redirection ?

21 Sep 2018 by Vaclav_

I just started using bash scripting language and having trouble understanding "command substitution " and " redirection". I am using bash man very frequently and know something about this specific subject. Here is an example of using command substitution. I used command "sed" to find line...

Bash

scripting

Bash -x and sed problem

22 Sep 2018 by Vaclav_

I have copied the following from LibreOffice and used "best guess" feature to post it. Hope the formatting pass. I am using the following function to output current line of bash -x debug script. echo_line_no () { grep -n "$1" $0 | sed "s/echo_line_no//" # grep the line(s)...

Bash

How to retrieve individual output from "sed = " command / array

25 Sep 2018 by Vaclav_

This is not a dupe of my previous post, I am asking for help to resolve specific issue now. I am using "sed" with an option "=" to retrieve file line number of first occurrence of pattern specified. The documentation states that "sed option = " OUTPUTs line number(s) where the match of...

Linux

Bash