Questions tagged [bash]
Questions specific to GNU’s Bourne Again SHell, as opposed to other Bourne/POSIX shells. For questions about Unix shells in general, use the /shell tag instead. For shell scripts with errors/syntax errors, please check them with the shellcheck program (or in the web shellcheck server at https://shellcheck.net) before posting here.
26,098
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What causes this behavior of bash's $COLUMNS variable?
I'm scripting a testing framework in bash and am running into a weird situation.
A couple things I'm doing in this post for illustration purposes:
Adding echo lines to the scripts; these are not part ...
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2
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How can I properly harden my system against some basic exploits like modifications of .bashrc?
I recently read a section on bashrc in the ubuntuusers wiki, in which a possible attack vector for privilege escalation is pointed out. Attackers, or malicious programs, could modify the bashrc or ...
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Setting variable (ORACLE_BASE) for oracle user | Installing Oracle 23
Goal: Install Oracle 23 into /u00/app (and not the default, /opt/oracle).
Problem: Oracle installs into /opt/oracle (I assume the variable ORACLE_BASE etc. is not properly set / read for user oracle ...
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tool or shortcut for copying part of the terminal
I apologize for the vagueness of this question but I saw this tool over 4 years ago at this point.
I remember working with a colleague at one point who knew a bash tool or shortcut that allowed him to ...
- 185
2
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1
answer
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What is the limit of string size passed to bash -c?
I have the following command
echo '123456789#' | xargs -I% bash -c 'echo %%%%%%%%%%%%%%%%%%%%%%%%%'
It doesn't expand the last %. Apparently there's a limit on how long the string passed to bash -c ...
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-4
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3
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59
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show which of a list of filenames do not exist in a given list of directories
I have a long list of filenames like 20231121_150111.jpg... in a text file (one filename per line).
And another list of directories. Those directories contain files.
How can I check and show which ...
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2
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2
answers
285
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Remove duplicates in file (without sorting!) leaving the _last_ of the occurences
Following https://www.baeldung.com/linux/history-remove-avoid-duplicates, I
added
clean_history() {
awk '!a[$0]++' $HOME/.bash_history > $HOME/.bash_history.tmp && mv $HOME/....
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1
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Are there alternatives to alias I'm not aware of?
Today I started to notice weird behavior running a local command for a binary installed through Go. It seems the command is aliased, but consulting alias, it isn't.
The command buf somehow executes cp!...
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25
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Ghost string in terminal, string doesn't go away when using backspace [duplicate]
Linux shell problem on a server, bash 5.1.4(1)-release. Debian 11.10.
I have this on my command line right now after pressing the up arrow:
server# ctr plugins listkubeadm init --pod-network-cidr=10....
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2
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45
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Need to make multiple multiline replacements in file
I have a file with multiple "paragraphs" like this:
<type>TRANS</type>
<attributes/>
<specification_method>rep_name</specification_method>
<trans_object_id/&...
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1
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How to put all function/command call output results to different corresponding vars: for stderr, for stdout, for string result and for return code?
I want to extend question How to store standard error in a variable and get general solution (bash function or functions) to extract from the called function/command together with standard error also ...
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2
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169
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Is it possible to translate bash to another human language like Arabic?
Bash commands are written in the Latin alphabet, is it possible to translate them to another language? In this case, Arabic. Arabic is written rtl and I remember I tried it using alias before when I ...
0
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HISTTIMEFORMAT="%F %T " leaves oddly formatted date/time stamps [duplicate]
I am following this page to add date/time stamps to ~/.bash_history. Specifically, I added HISTTIMEFORMAT="%F %T " to my ~/.bashrc. Running exec bash didn't cause the date/time stamp to be ...
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Best practice for running Intel MKL-dependent program as a systemd service
We have a systemd service that looks something like
[Service]
Environment="SOME_VAR=some_value"
# etc.
ExecStart=/bin/bash -c 'some command'
This service file, of course, is templated and ...
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1
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How to escape symbols in jq query?
I try to get area of JSON created by kubectl as another user.
runuser -l username -c "kubectl get ing -A -o json | jq --arg namespace "default" -r '.items | map(select(.metadata....
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