bash Archives - IT Nursery

linux, Programming

IT Nursery

How to preserve line breaks when storing command output to a variable?

I’m using bash shell on Linux. I have this simple script … #!/bin/bash TEMP=`sed -n "https://stackoverflow.com/""Starting deployment of"'/,/'"Failed to start context"'/p' "/usr/java/jboss/standalone/log/server.log" | ...

June 4, 2022
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bash, Programming

IT Nursery

How to replace an entire line in a text file by line number

I have a situation where I want a bash script to replace an entire line in a file. The line number is always ...

June 4, 2022
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bash, Programming

IT Nursery

Run a string as a command within a Bash script

I have a Bash script that builds a string to run as a command Script: #! /bin/bash matchdir="/home/joao/robocup/runner_workdir/matches/testmatch/" teamAComm="`pwd`/a.sh" teamBComm="`pwd`/b.sh" include="`pwd`/server_official.conf" serverbin='/usr/local/bin/rcssserver' cd ...

June 4, 2022
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linux, Programming

IT Nursery

Check if a variable exists in a list in Bash

I am trying to write a script in bash that check the validity of a user input. I want to match the input ...

June 4, 2022
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bash, Programming

IT Nursery

Intersection of two lists in Bash

I’m trying to write a simple script that will list the contents found in two lists. To simplify, let’s use ls as an ...

June 4, 2022
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bash, Programming

IT Nursery

Grep characters before and after match?

Using this: grep -A1 -B1 "test_pattern" file will produce one line before and after the matched pattern in the file. Is there a ...

June 4, 2022
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bash, Programming

IT Nursery

How to merge every two lines into one from the command line?

I have a text file with the following format. The first line is the “KEY” and the second line is the “VALUE”. KEY ...

June 3, 2022
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bash, Programming

IT Nursery

How do I delete/remove a shell function?

I have done this: $ z() { echo 'hello world'; } How do I get rid of it? 2 Answers 2

June 3, 2022
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bash, Programming

IT Nursery

choosing between $0 and BASH_SOURCE

How does one choose between "$0" and "${BASH_SOURCE...

June 3, 2022
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json, Programming

IT Nursery

Passing bash variable to jq

I have written a script to retrieve certain value from file.json. It works if I provide the value to jq select, but the ...

June 3, 2022
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