A set of dynamic variables that can affect the running processes.

learn more… | top users | synonyms

1
vote
2answers
16 views

Does X mangle prompt environment variables?

I'm starting it with startx. Before that I have PS1 in my environment: $ cat /proc/self/environ | tr '\0' '\n' | egrep '^PS' PS1=[\u@\H \w] PS3=> PS2=> PS4=+ From inside X I get: $ cat ...
1
vote
1answer
16 views

How can I consistently set an environment variable for a single program?

I'm using LC_TIME="en_AU.UTF-8" in general, and I'm happy with that. However, when I use Thunderbird, I'd like it to use a 12-hour clock. I've created a custom locale, and it works fine if I launch ...
0
votes
0answers
17 views

Possible to pass env vars into chpst without envdir?

I use runit to daemonize my web application, and I'm trying to see if I can have my process managed by sv not have to have a corresponding envdir for its environment variables. I wonder if I can just ...
2
votes
3answers
41 views

Controlling the environ passed to child process by bash

I am using x86_64 GNU/Linux with bash #include <stdio.h> #include <stdlib.h> int main(int argc, char **argv) { system("set > setc"); // A subset of `$ ...
1
vote
0answers
36 views

What does CRON=1 do?

What does setting CRON=1 do when set in front of a command? CRON=1 ./foobar.sh I suspect that the cron environment variable does something for printing to standard out. But I can't find anything ...
19
votes
1answer
5k views

Difference between environment variables and exported environment variables in bash

Bash seems to differentiate between variables which have been exported and those which have not. example: $ FOO=BAR $ env | grep FOO $ set | grep FOO FOO=BAR set sees the variable but env does ...
2
votes
2answers
214 views

Setting the TOPCOLORS environment variable

I don't seem to be able to find any examples on the Internet for this environment variable, which top will apparently read and use to display colours. How would I set this variable correctly so top ...
2
votes
0answers
8 views

Configure where GRUB2 environment block is located

I have Arch, Ubuntu, and GRUB2 installed on a BTRFS filesystem. I'm aware that GRUB cannot write to BTRFS for a variety of good reasons, and therefore cannot save environment variables to ...
21
votes
6answers
8k views

How to print only defined variables (shell and/or environment variables) in bash

The bash builtin command set, if invoked without arguments, will print all shell and environment variables, but also all defined functions. This makes the output unusable for humans and difficult to ...
1
vote
3answers
298 views

gmrun stopped searching user added path

gmrun started ignoring the PATH variable I defined in ~/.bashrc for no obvious reason. Anyone has any idea how I can find out a way to solve this annoying problem? EDIT I have not found the ...
157
votes
6answers
266k views

How to correctly add a path to PATH?

I'm wondering where a new path has to be added to PATH environment variable. I know this is accomplished editing .bash_rc (for example), but it's not clear how to do this. This way: export ...
1
vote
0answers
24 views

How to set environment variable for BACI compiler and interpreter?

I have installed executable files for BACI compiler and interpreter in my Ubuntu system. But now every time I have to compile my .cm file I have to go to the program folder and run ./bacc and ...
0
votes
0answers
25 views

Set Environment Variable for Ranger File Manager

I've recently stumbled across ranger file manager and immediately took a liking to it. However, there is still a problem I couldn't figure out the solution to: How is it possible to change environment ...
2
votes
2answers
45 views

The 'LANGUAGE' locale variable - how to set English as primary language? A bug in gettext?

The "LANGUAGE" variable is supposed to set the default language and can be used to specify a set of languages, where the next language will be used if a message is not available in the first ...
1
vote
1answer
27 views

$USER not set ssh

On some of my debian wheezy servers there is a global variable $USER that contains the current logged in username and on some this variable is not set immediately at login. How do I set $USER so it ...
1
vote
2answers
42 views

Do programs source .bashrc when run?

I append to my PATH environment variable in my .bashrc file (Ubuntu v12). I also have a service (Atlassian Bamboo) that relies on the modifications to PATH. When I restart the service (which runs as ...
0
votes
1answer
52 views

make custom commands on android 4.4.2

I want to program and debug in my android phone. To do that I downloaded c4droid and it's gcc plugin. after a lot of tries I understood that gcc is in directory ...
1
vote
1answer
94 views

systemd: default value for environment variable

I would like to migrate some OpenRC init script to systemd but I think that it is general problem of environment variables handling in systemd. Original OpenRC files There is a file e.g. ...
1
vote
4answers
5k views

Removing a directory from PATH

I'm trying to compile wxWidgets using MingW, and I have cygwin in my path, which seems to conflict. So I would like to remove /d/Programme/cygwin/bin from the PATH variable and I wonder if there is ...
5
votes
2answers
58 views

Introduction of env --null

I have tried to extract environment variables in a Python process with help of env --null, which works even for environment variables containing newline character. But on some machines I have ...
3
votes
2answers
47 views

Unsetting environment variable with an empty name

For some reason, my system sets an environment variable with no name. This can be seen in the output from printenv as a line containing only = and causes problems for Python (more specifically the ...
0
votes
1answer
30 views

How does sudo -E work here?

I executed the following command to add a ppa repository in Ubuntu: sudo add-apt-repository ppa:ppaname/ppa This command returned an error that the ppa name format is not correct. Then I looked here ...
1
vote
2answers
63 views

Makefile make install not executing multiple line commands

I have a Makefile that contains an install section to allow me to make install after building the source code. The install section contains two lines of shell commands: install: /usr/local/lib cp ...
27
votes
7answers
2k views

How to determine where an environment variable came from

I have a linux instance that I set up some time ago. When I fire it up and log in as root there are some environment variables that I set up but I can't remember or find where they came from. I've ...
2
votes
0answers
69 views

Debian ignores PAM env variables (while Arch doesn't)

I have a weird issue with my Debian Sid system. I want to set a global environment variable in /etc/environment, which is supposed to be read by the pam_env module. Unfortunately, after having relogin ...
3
votes
1answer
29 views

Protecting process's envvars from exposure

From I've read about current best practices for developing web applications (such as the Twelve Factor guide), the recommended approach for storing configuration data is within environment variables. ...
8
votes
3answers
346 views

How can I list all shell variables?

Reading about this question: In zsh how can I list all the environment variables?, I wondered, how can I list all the shell variables? Also, does the distinction between shell variables and ...
2
votes
1answer
50 views

Executable cannot be found

I installed gradle in /opt/gradle-2.2.1 I edited /etc/environment to look like this GRADLE_HOME="/opt/gradle-2.2.1" ...
2
votes
2answers
208 views

sudo as another user with their environment

$ whoami admin $ sudo -S -u otheruser whoami otheruser $ sudo -S -u otheruser /bin/bash -l -c 'echo $HOME' /home/admin Why isn't $HOME being set to /home/otheruser even though bash is invoked as ...
0
votes
1answer
96 views

Please set env variable CHROME_BIN

> node node_modules/karma/bin/karma start test/karma.conf.js INFO [karma]: Karma v0.12.30 server started at http://localhost:9876/ INFO [launcher]: Starting browser Chrome ERROR [launcher]: Cannot ...
4
votes
2answers
119 views

Share environment variables between bash and fish

bash and fish scripts are not compatible, but I would like to have a file that defines some some environment variables to be initialized by both bash and fish. My proposed solution is defining a ...
0
votes
1answer
225 views

Bash script class path issue with java

Content of /opt/scripts/jvm/jvm.script.sh #!/bin/bash JAVA_HOME='/java' PATH="$PATH:/$JAVA_HOME/bin" java -cp ./classes:./lib com.mystuff.bar.foo.myclass & Content of /etc/init.d/init.script.sh ...
0
votes
1answer
26 views

how to export nam of logged in user correctly?

I have the following script here. #!/bin/bash #some initial variables DLURL=https://raw.github.com/horvan/drubuntu/master DIRURL=/opt/.drubuntu #Get files to run the installation wget -O ...
3
votes
2answers
136 views

forward function and variables into sudo su - <user> <<EOF

I have declared functions and variables in bash/ksh and I need to forward them into sudo su - {user} << EOF: #!/bin/bash log_f() { echo "LOG line: $@" } extVAR="yourName" sudo su - ...
3
votes
2answers
441 views

What is $PWD? (vs current working directory)

So Wikipedia (link) tells me that the command pwd is short for "print working directory", and that makes sense. But for the environment variable, the "P" has to be an acronym for something else than ...
0
votes
1answer
54 views

Issue due to scope of environment variables

I had an Internet connection problem which turned out to be related to setting up the appropriate proxy environment variables. After adding lines like export ...
0
votes
1answer
35 views

Remove a folder with the same name as an environment variable

I was messing around with a log4j properties file and accidently made a folder with the following text ${foo} however I also have an environment variable named foo that points to a folder so thus if I ...
1
vote
3answers
4k views

Get environment variable of other user [closed]

Is there a way I can see the environment variable of an other user? I want to do that as root, so permissions won't be a problem I guess. For the user himself, I use echo $PATH or set | grep PATH ...
2
votes
1answer
84 views

clear out all variables without closing terminal

I want to know how to clear all variables which I defined in command prompt without closing terminal ? for example, if I set a variable in command prompt as: $ a=1 now I want to delete the ...
1
vote
3answers
115 views

How long do the contents of the .bash_history file last?

How can I modify the contents of my bash_history file? What values or variables control how long the history lasts? Are there any other things I can change to provide finer control of my BASH ...
5
votes
5answers
20k views

Export an env variable to be available at all sub shells, and possible to be modified?

Suppose I have export MY_VAR=0 in ~/.bashrc. I have an opened gnome terminal, and in this terminal, I change $MY_VAR value to 200. So, if I do echo $MY_VAR in this terminal, 200 is shown. Now, ...
1
vote
2answers
27 views

Why is $COLUMNS not listed by either env or set? (on zsh)

I can $ echo $COLUMNS 95 and get a result, but if I env | grep COLUMNS or set | grep COLUMNS I get nothing. (Update: I just discovered that the behavior is different on bash. I'm using ...
1
vote
1answer
175 views

Storing longer text output in memory in shell variables vs Writing to disk

I have the below call to db2 command line tool inside a loop which runs 100k iterations. (the db2 output is 5 rows of 20 chars approx per each call, total of approx 100k calls. The input to SP is ...
8
votes
2answers
6k views

Who sets $USER and $USERNAME environment variables?

Also, will these variables always match currently logged-in username (they do on my Debian system)? Can I assume their availability in other Unix(-like) systems? I'm also curious why one would use ...
0
votes
3answers
1k views

I have an environment variable for LANG set in ~/.profile but it is not getting set

I want to set the locale. I have this in my ~/.profile #language export LANG=en_GB.utf8 export TESTING123=en_GB.utf8 But when I type: echo $LANG $TESTING123 I get (LANG not set, but TESTING123 ...
1
vote
1answer
35 views

Exporting Variables from Read

I'm asking the user to input some data using Read that data will be save on a variable that is going to be use in another shell script. However, for some reason is not working. This is what I got in ...
0
votes
2answers
56 views

How can I expand all variables at the command line in Zsh?

In an earlier question, specific to bash, I asked How can I expand a relative path at the command line, with tab completion? I liked @Mikel's answer that mentioned using Ctrl+Alt+e to expand all ...
13
votes
1answer
256 views

Is there a difference between prepending a name-value-pair to a command and using env in bash?

Let's say I invoke A=B command and env A=B command in bash. Is there any situation where there might be a difference between both invokations?
0
votes
2answers
75 views

LD_LIBRARY_PATH always blank after sudo

I get shared library errors whenever I seem to install software manually. Upon executing echo $LD_LIBRARY_PATH it shows up as.. nothing. I've tried adding /usr/local/lib to a .conf file in ...
-4
votes
3answers
55 views

Data Types in UNIX [closed]

I have 2 questions. Q#1: data types & variables I have just begun reading UNIX and came across variable definitions. As per the site I'm referring UNIX variables are defined directly with a ...