Linked Questions
19 questions linked to/from Setting an environment variable before a command in Bash is not working for the second command in a pipe
4
votes
2
answers
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Bash variable assignment before command [duplicate]
A couple of days ago I came across a command
AWS_ACCESS_KEY="foo" AWS_SECRET_KEY="bar" aws list iam
I see that setting variables before a command adds those variables in the command's environment:
#...
- 1,554
598
votes
7
answers
487k
views
How to keep environment variables when using sudo [closed]
When I use any command with sudo the environment variables are not there. For example after setting HTTP_PROXY the command wget works fine without sudo. However if I type sudo wget it says it can't ...
- 8,519
194
votes
4
answers
170k
views
How can I set an environment variable only for the duration of the script?
On Linux (Ubuntu 11.04 (Natty Narwhal)) in Bash, is it possible to temporarily set an environment variable that will only be different from the normal variable for the duration of the script?
For ...
- 1,941
141
votes
3
answers
95k
views
Why should eval be avoided in Bash, and what should I use instead?
Time and time again, I see Bash answers on Stack Overflow using eval and the answers get bashed, pun intended, for the use of such an "evil" construct. Why is eval so evil?
If eval can't be used ...
- 19.4k
62
votes
5
answers
47k
views
Setting environment variable for one program call in bash using env
I am trying to invoke a shell command with a modified environment via the command env.
According to the manual
env HELLO='Hello World' echo $HELLO
should echo Hello World, but it doesn't.
If I do
...
- 1,350
22
votes
4
answers
18k
views
passing command line argument to python-behave
I am using python-behave for BDD testing, I have to pass an URL (e.g. www.abc.com) from command line.
$behave -u "www.abc.com"
To achieve this, I have read behave documentation but there are not ...
- 251
10
votes
1
answer
9k
views
Git index and commit is very slow
I have a local git repository and use git add file1 file2 file3... to add my modifications to the git index. Afterwards I use a plain git commit. Each command takes around 3 to 6 seconds. My ...
- 2,999
7
votes
2
answers
4k
views
Pass environment variable to multiple commands
When I do
Hello=123 npm run a && npm run b && npm run c
I was expecting Hello=123 environment variable to be passed inside a, b and c process. But it turns out only a has the ...
- 9,570
55
votes
0
answers
65k
views
How to add a line in sed if not match is found [duplicate]
I am using the following sed command to replace some parameters in a config file:
sed -i 's/^option.*/option=value/g' /etc/fdm_monitor.conf
Now I have one problem. If the line does not exist, I want ...
- 611
6
votes
1
answer
5k
views
Limit GPU devices in Tensorflow
I am developing in Python an application which uses Tensorflow and another model which with GPUs.
I have a PC with many GPUs (3xNVIDIA GTX1080), due to the fact that all models try to use all ...
- 170
6
votes
3
answers
7k
views
How to start node server and export NODE_PATH (with npm start or inline command)
Before starting the server, I need to export ('set' actualy, I'm using Win7) NODE_PATH variable. I tried to do it with this command (not working even in command line):
set NODE_PATH=./ && ...
- 6,023
4
votes
1
answer
2k
views
colour scheme for gnu source-highlight with a dark background
I'm using gnu source-highlight mostly with less (so it's using ANSII terminal codes to make colours). However, with a dark background colour, the highlighted parts are dim and hard to read.
Is there ...
- 15k
4
votes
1
answer
2k
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Cannot set environment variable before command
I am trying to set a variable before calling a command in bash (on Mac):
BRANCH=test echo "$BRANCH"
But I get an empty echo.
printenv also has no other variable with the same name:
$ printenv | ...
- 21.4k
0
votes
1
answer
4k
views
How can I specify environment variables for the VS Code process in my VS Code settings?
I find those two method to add environment variables.
add environment variables in terminal.integrated.env.osx for terminal。
add environment variables in launch.json for debugging.
But no similar ...
- 1
1
vote
1
answer
898
views
Start Xdebug session for Symfony CLI commands
My dev setup includes PHP 8 and Xdebug 3 in a docker container for a Symfony project.
Currently I use xdebug.start_with_request=yes, but I don't like the performance impact that has.
How do I start an ...
- 3,189