Questions tagged [scripting]
A script is a sequence of commands or instructions that are executed by an interpreter program rather than compiled into a standalone executable program.
4,566 questions
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Mount a partition from a script unless it is already mounted
I would like to mount a partition of an external hard drive from a script using
udisksctl mount --block-device /dev/sda1
and in the end of the script I would like to unmount it.
However, it may ...
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Check if multiple files exist on a remote server
I am writing a script that locates a special type of file on my system and I want to check if those files are also present on a remote machine.
So to test a single file I use:
ssh -T user@host [[ -f /...
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Is it possible to protect a bash script against a hostile environment?
Bash allows to export read-only variables and functions to the environment.
Also, when a bash script is run, Bash sources the file BASH_ENV was set to, unless invoked with -p.
How do you protect ...
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How to list only the last name.partXXX.rar file?
In Linux in a folder, without subfolders, there are many files like this scheme.
I list them with ls -1.
1yBWVnZCx8CoPrGIG.part01.rar
1yBWVnZCx8CoPrGIG.part02.rar
1yBWVnZCx8CoPrGIG.part03.rar
...
- 241
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answer
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Making `apt-get` read answers from stdin on graphical Ubuntu
This may seem like a question asked, but I have yet to find anything that works and I start suspecting it may be a bug in apt-get…
So, I have a python installer wrapping around apt-get, whose relevant ...
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answer
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Do I need to define an absolute path to be able to compile the DRM / Panfrost subtree code of JSM on the RockPro64 / Khadas Edge-V / RK3399?
I'm trying to compile the drm-subtree of JSM because I want to enable the panfrost driver on the RockPro64 / KHADAS EDGE-V / RK3399. The code is here:
https://github.com/jsm222/drm-subtree
He improved ...
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Is it possible to silence the initial call in xtrace, when BASH_XTRACEFD is set?
#!/usr/bin/env bash
exec {BASH_XTRACEFD}>./xtrace.log
declare -p BASH_XTRACEFD
set -x
{ : "how do you hide this in ./xtrace.log?"; } 2>/dev/null # fail
# { :; } "${BASH_XTRACEFD:-...
- 611
656
votes
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Repeat a Unix command every x seconds forever
There's a built-in Unix command repeat whose first argument is the number of times to repeat a command, where the command (with any arguments) is specified by the remaining arguments to repeat.
For ...
- 6,709
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Rename a set of files according to a specific scheme, with rename back option
In Linux in a directory there are files, ls -1 shows me this output :
file1.1-rvr
file1.2-rvr
file1.3
file1.4-rvr
file1.5
file1.6-rvr
file2.1
file2.2
file3.1
file3.10
file3.2-rvr
file3.3-rvr
file3.4
...
- 241
660
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4
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Using "${a:-b}" for variable assignment in scripts
I have been looking at a few scripts other people wrote (specifically Red Hat), and a lot of their variables are assigned using the following notation
VARIABLE1="${VARIABLE1:-some_val}"
or some expand ...
- 7,529
1
vote
1
answer
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Process some Folders and format the output
In Linux there are some Folders.
I want to process each of this Folders with the program myprogramm.
I get a list with ls -1 or much better, sure only Folders with:
find . -maxdepth 1 -type d -printf '...
- 241
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1
answer
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command not running from kde powerdevil
made a simple command to change my power mode to "balanced-performance" (lenovolegion power mode for custom mode), works fine in terminal and running the file, but when listing it as a ...
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What are the secure ways to use credentials in bash scripts?
I have a third-party service. Its API and credentials let me scrape service data on my local Linux machine. I want to use this API inside a bash script and launch it via cron, but I don't want to ...
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Bash script: performance comparison of file reading methods
I'm trying to find the "right" way to read files line-by-line.
I have been using for for line in $(cat "$FILE"); do for a while, and I really enjoy its clearness.
I know that while ...
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Linux Bash Shell Script Error: cannot execute: required file not found
I have two similar scripts with different names. One works fine but other throws error.
Can anyone please tell me what is the issue?
This is my test.sh scripts which works fine
[nnice@myhost Scripts]$ ...
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