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.
1,559 questions
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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 $HOME contains.
However, two methods of dynamically acquiring the path are ...
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2
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How to check if env exist in bash?
What is the standard way, in bash, to check if an environment variable is set up? I'm a little confused between the following options:
! [ -z "${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&...
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How many environments are stored in the stack? [duplicate]
When I used the getenv() function to get the address of USER, I got 0x7ffceae5e923 but when randomly checking the address using gdb, the $USER variable was stored at 0x7ffffffffe90e [ I started a ...
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What do programs use to read their environment?
I'm on Fedora, where all preinstalled shells apparently support bashisms: bash --posix does, and even sh. Still, when I used this function,
pathprepend () {
if [[ ":$PATH:" != *":$1:...
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best way to load an .env file as exported variables
I find .env files to be funny things, is there a one line utility to do this:
set -o allexport
source .env
set +o allexport
I do not like flipping the shell settings like that, wouldn't it be nice if ...
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how do I setup VULKAN_SDK environment variables in Debian/Raspberry Pi Os
First things first; I am new to Linux and I don't understand a lot of things.
I'm working on a Raspberry Pi OS which is Debian based.
There is a file with environment variables: "setup-env.sh&...
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Bad environment variables messed up booting on Debian bassed (Raspberry Pi OS)
I set the wrong path in some environment variables, and now booting gives a whole new taste. The OS is Raspberry Pi OS, which is Debian based.
RESULT:
Right after booting, I get a black screen with a ...
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How is `flatpak override --env=FOO=bar some.app.id` suppose to work?
I thought that I could:
Use override to set an env for some flatpak
And then every time I run this app
If I enter in the process (to be sure, I did this for all 3 types of pids: instance,pid,child-...
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Weird shell variable expansion in bash
The bash manual says "The environment for any simple command or function may be augmented temporarily by prefixing it with parameter assignments".
I also understand that exported variables ...
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how can I run a crontab with a particular user's full environment variables?
Hello can you please help?
I am running a script in WSL that requires the auto loaded host variables to be present when the crontab runs it runs when I am at the user log in however not when I am ...
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How to handle a missing environment variable set in `crontab`
I have a bash script that I need to be able to start from either:
cron
an interactive (logon) shell
This script needs to know whether it was started from cron, or started from an interactive shell. ...
- 3,727
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With sudo, why are inline environment variables not read correctly without -E on some systems?
I have a bash script which logs into my bitwarden instance using the bw cli, in the following way:
test.sh:
#!/usr/bin/sh
set -e -o pipefail
bw logout --quiet || true
BW_CLIENTID=$(cat ./credentials....
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2
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Using Bash, mysteriously don't need "export" command
I'm using Cygwin to get Linux functionality on Windows 11. Specifically, I am using Cygwin's xpdf to browse PDFs. It can open a hyperlinked URL if $BROWSER is set. Mysteriously, I found that I don'...
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