shell Archives - IT Nursery

Programming, shell

IT Nursery

How to set child process’ environment variable in Makefile

I would like to change this Makefile: SHELL := /bin/bash PATH := node_modules/.bin:$(PATH) boot: @supervisor \ --harmony \ --watch etc,lib \ --extensions js,json ...

June 3, 2022
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Programming, shell

IT Nursery

How to get “wc -l” to print just the number of lines without file name?

wc -l file.txt outputs number of lines and file name. I need just the number itself (not the file name). I can do ...

June 1, 2022
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Programming, shell

IT Nursery

Rename multiple files by replacing a particular pattern in the filenames using a shell script [duplicate]

This question already has answers here: Rename multiple files based on pattern in Unix (23 answers) Closed 4 years ago. Write a simple ...

June 1, 2022
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Programming, shell

IT Nursery

Looking for ALT+LeftArrowKey solution in zsh

I just recently switched from bash to zsh, however I miss my Alt+LeftArrowKey and Alt+RightArrowKey to go back and forth a word at ...

May 31, 2022
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Programming, shell

IT Nursery

How can I check if a command exists in a shell script? [duplicate]

This question already has answers here: How can I check if a program exists from a Bash script? (39 answers) Closed 3 years ...

May 31, 2022
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Programming, shell

IT Nursery

How to get the second column from command output?

My command’s output is something like: 1540 "A B" 6 "C" 119 "D" The first column is always a number, followed by a ...

May 31, 2022
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Programming, shell

IT Nursery

Shell command to find lines common in two files

I’m sure I once found a shell command which could print the common lines from two or more files. What is its name? ...

May 28, 2022
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Programming, shell

IT Nursery

How to use `jq` in a shell pipeline?

I can’t seem to get jq to behave “normally” in a shell pipeline. For example: $ curl -s https://api.github.com/users/octocat/repos | jq | cat ...

May 26, 2022
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Programming, shell

IT Nursery

How to exclude this / current / dot folder from find “type d”

find . -type d can be used to find all directories below some start point. But it returns the current directory (.) too, ...

May 26, 2022
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Programming, shell

IT Nursery

How to set ssh timeout?

I’m executing a script connecting via password-less SSH on a remote host. I want to set a timeout, so that if the remote ...

May 26, 2022
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