Questions tagged [environment-variables]
For questions pertaining to environment variables, a set of dynamic variables that can affect the running processes behavior and access to resources. Use this tag for questions about environment variables or questions about issues arising from the impact of setting or modifying the variables value in running processes behavior and access to resources.
1,593 questions
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How to make my avalonia app to open and come to top of all other apps even if user desn't interact with it for everyone or two mins
I have a tracker app which need to open on its own when used doesn't work or works too much. So i used TopMost and x11.Xraisewindow . But after 2 times my app is not coming too top or opening. Instead ...
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How to start vipw/vigr without my vimrc?
my vimrc seems to not play along with vipw/vigr (probably because i only allow root to place tmp/buffers/etc in a secure location) so I tried (using bash):
user@host$ EDITOR='/usr/bin/vim -u NONE' ...
- 943
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Newlines in environment variable names under POSIX sh
This question asks how to get a list of environment variable names in POSIX sh. The top answer suggests invoking awk via the shell, but gives this caveat:
The output is ambiguous if the name of an ...
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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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LibreOffice crashes with Miniconda3 in path
this is a post that has workaround but not an explanation
Sometime in last 4 weeks my LibreOffice on my debian started crashing. Not producing window with eg. LOWriter, just a "crashed docs ...
- 131
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How to temporarily substitute the login shell for running a shell command/subprocess?
My login shell is Fish, but I would like to execute a shell command (apt install ...) as if my login shell was Bash.
Is it possible to make a command/subprocess believe that my login shell is /usr/bin/...
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Are simple command variable assignments accessible in nested scripts? e.g., does `child.sh` have "FOO=BAR" when running "FOO=BAR ./parent.sh"?
Although this is easy to try and see, I was looking for the answer on StackOverflow and couldn't find it. That's why I'm asking and answering my question.
I recommend reading this first. The answer is ...
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bash variable substitution inside heredoc delimiter: how does it work? [duplicate]
For a school project, I am tasked with making my own (simplified) shell, with bash being the reference point. This includes replicating heredoc behavior which was fun until I stumbled upon variable ...
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Is there a Bash variable containing the name of the previously executed function?
I want to line up a couple of Bash functions based on the success or failure of the execution of the preceding function.
If something fails, I want to print an error message: function_x has failed.
...
- 287
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Resetting service environment variables on stop or restart
I'm looking to undo or essentially reset any environment variable changes made by the service when it stops. Can this be done easily by systemd, I haven't found any straight forward way to do so using ...
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How to make bash not set the underscore _ environment variable?
How to make bash not set the underscrore _ variable for the processes that it's starting?
Explanation of what it is if you haven't encountered it before:
If you launch env from bash, you'll see the ...
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How should one choose whether to utilise ~ or $HOME? [duplicate]
Context
When utilising the IEEE Standard 1003.1-2017 Shell Command Language, I frequently want to reference the value which $HOME contains.
However, two methods of dynamically acquiring the path are ...
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How to check if env exist in bash?
What is the standard way, in bash, to check if an environment variable is set up? I'm a little confused between the following options:
! [ -z "${VAR}" ]
[ -n "${VAR}" ]
[ "${...
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how to pass environment variables to singularity exec
I have a BASH pipeline which at a point runs a Singularity container with singularity exec as follows:
singularity exec --bind `pwd`:/folder --bind $d:/results <image>.sif <tool_command> -...
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My bash script keeps telling me my directory doesn't exist even though it does [duplicate]
I have a script and when I run it, it returns
Directory not found: ~/Pictures/Wallpaper
The script is as follows:
#!/bin/bash
# Check if the wallpaper directory exists
if [ ! -d "$WALLPAPER_DIR&...
