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

learn more… | top users | synonyms (1)

55
votes
5answers
135k views

How do I set a user environment variable? (permanently, not session)

This is irritating me. I seen several suggestions (all using different files and syntax) and none of them worked. How do I set an environment variable for a specific user? I am on debian squeeze. ...
0
votes
2answers
54 views

export PATH permanently [duplicate]

I have exported the PATH but once I switch to a different terminal or reboot Debian, $PATH is reset. Here are the steps I take: ~$ vim scripts.sh #!/bin/bash echo "Hello" I save it as mybash.sh ...
0
votes
1answer
473 views

How to specify a custom include directory in Debian?

I am trying to compile my program on a Debian system via ssh and without root privileges. PRETTY_NAME="Debian GNU/Linux 7 (wheezy)" NAME="Debian GNU/Linux" VERSION_ID="7" VERSION="7 (wheezy)" I ...
2
votes
1answer
43 views

Why sudo env is not showing all the environment variables?

I have a variable set in a script file in /etc/profile.d/somescript.sh I have modified the /etc/sudoers and added "ansible" user to the sudoers file like this: Defaults !env_reset ansible ...
4
votes
0answers
40 views

Is it possible to make an exec call that “returns”?

Is there a way to make the exec system call work like a function call that returns instead of totally replacing the current process image? My motivation is trying to integrate two shells with ...
1
vote
0answers
49 views

How to set Ruby GEM_HOME and GEM_PATH

I'm a NOVICE user of Linux and using Linux mint 17.1 I've reinstalled Linux mint 20 time in last 3 days for that issue but could not fix it I'm trying to install ruby on rails using rvm what ...
2
votes
1answer
44 views

How do I run GUI applications as root by using pkexec?

I am using Trisquel GNU/Linux-Libre which comes with Gnome3 Flashback Desktop Environment. I know that I can run GUI application as root by sudo & gksudo but I want to know that How do I run GUI ...
-1
votes
1answer
23 views

How can I execute and export in a single shellscript

I have two shell scripts. $ cat java_alternative_7 #!/bin/sh sudo update-java-alternatives -s java-7-oracle $ cat java_home_7 #!/bin/sh export JAVA_HOME=/usr/lib/jvm/java-7-oracle It's simple that ...
1
vote
1answer
14 views

When not started from a terminal, Emacs does NOT pick up the SSH_AUTH_SOCK environment variable

When I don't start it from a terminal, Emacs 24.5.1 (compiled from source) doesn't pick up my environment variables. In particular, to "import" the environment variables from shell, I have in my ...
0
votes
1answer
30 views

csh: Terminal inherits environment variables from an unknown location

I'm on a shared machine running CentOS 5.10 that I log onto using VNC from Windows 7. Our default and official shell is csh. Every time I open a new terminal, I have three particular environment ...
0
votes
0answers
5 views

Pip managed python extending distribution packaged modules

I am looking for recommendations on extending the python library managed by my arbitrary distribution with packages available via PPI. Basically I have been working with a distro managed installation ...
2
votes
2answers
56 views

how to pass environment variable to sudo su

I basically need to do this: DUMMY=dummy sudo su - ec2-user -c 'echo $DUMMY' This doesnt work. How can I pass the env variable $DUMMY to su? -p doesnt work with -l.
1
vote
3answers
51 views

Differences between sudo and su in inheriting environment

Why can the command run by sudo inherit the environment from the parent shell process, while the shell process after sudo su to the root user doesn't? t@ocean:/tmp$ export ME=tim t@ocean:/tmp$ sudo ...
0
votes
3answers
53 views

Pass environment variables' values to a program? [duplicate]

When I run a perl script pdfannotextractor.pl in bash, I want to set the value of a variable TEXMFVAR needed by the script, and pass it to the script. I googled around, and thought I found a ...
1
vote
2answers
48 views

Identify user defined variables

In a GNU/Linux bash shell, I am using a command to identify and save all my user defined variables at a specific point in time for debugging purposes (I source the file later): declare | grep ...
2
votes
2answers
59 views

Weird behaviour when setting environment variables with .bash_profile: only last export works properly

I am trying to export some environment variables in Unix using the .bash_profile It reads now like this: export PATH=${PATH}:/usr/local/cuda-6.0/bin/ export ...
0
votes
1answer
56 views

Strange output when echoing variable from a different user

$ sudo su - user1 -c 'echo $DOMAIN_HOME' /app/user1/DOMAINHOME This looks fine, right? However, let's dig a little deeper: $ sudo su - user1 -c 'echo $DOMAIN_HOME' | tee test.out $less test.out ...
20
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 ...
23
votes
2answers
96k views

How to permanently set environmental variables

My variables are LD_LIBRARY_PATH=/usr/lib/oracle/11.2/client64/lib ORACLE_HOME=/usr/lib/oracle/11.2/client64 How to save these variables permanently ?
0
votes
2answers
45 views

set library path for current script [closed]

How can I set the library path for the current script that's running? I mean I don't want to list a new path for the libraries in a textfile. I tried it using export LD_LIBRARY_PATH=$(pwd)/lib/ This ...
2
votes
2answers
104 views

Where does the TERM environment variable default get set?

When I open a terminal window with the GNOME Terminal emulator in the desktop GUI the shell TERM environment variable defaults to the value xterm. If I use CTL+ALT+F1 to switch to a console TTY ...
18
votes
1answer
296 views

Why does exporting vim as EDITOR in zsh disable keyboard shortcuts?

My .zshrc looks like this: export EDITOR="/usr/bin/vim" Now when I open a terminal and enter a keyboard shortcut like ctrla to go to the beginning of the line, it doesn't work. Instead, the string ...
-1
votes
1answer
28 views

How do I set an environment variable in the shell to be result of python script? [duplicate]

If I run export TEST=script.py echo $TEST It outputs script.py script.py code: return 5 can TEST be set to 5? Obviously script will do something in future not just return a number
0
votes
1answer
25 views

How can I add default command line parameters to an executable in a way that will also work on GUI apps? [duplicate]

I want to pass a command line program by default when I run it. myprog --foo=bar The solution I could think of was to add a custom "myprog" wrapper to my "bin" folder #! /bin/sh /usr/bin/myprog ...
3
votes
3answers
814 views

How can I make shell aliases available when shelling out from Vim?

In my .zshrc, I declare some aliases. Eg, which dbstart shows the contents of that alias. If I open vim from that shell, it is a child process. In Vim, I can run shell commands with :! some_command. ...
6
votes
2answers
1k views

Using environment variables in Tmux status bar shell commands

I am attempting to create a tmux status bar which shows three timezones: US Eastern Time :: UTC :: Central European Time. Using the TZ environment variable makes the date command show the time in a ...
3
votes
1answer
42 views

Bash Environment Variable Issue [closed]

We have a 3rd party scheduler that runs one of our job's shell scripts in bash. When the shell script is called, it sets the environment variables from the scheduler as $1, $2, $3, etc on the command ...
3
votes
3answers
56 views

Is there a nice way to set directory/project local environment variables?

I have been working on several projects, and they require different environment variables (e.g., PATH for different versions of clang executables, PYTHONPATH for several external modules). Whenever I ...
1
vote
2answers
296 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 ...
12
votes
3answers
5k views

using export in .bashrc

I have noticed in my .bashrc, that some lines have export in front, such as export HISTTIMEFORMAT="%b-%d %H:%M " ... export MYSQL_HISTFILE="/root/.mysql_history" whereas other have not, such as ...
39
votes
4answers
1k views

What exactly is an environment variable?

I know that VARIABLE=value creates an environment variable, and export VARIABLE=value makes it available to processes created by the current shell. env shows the current environment variables, but ...
2
votes
5answers
2k views

How do I pass a variable from my local server to a remote server?

I am trying to pass a variable from my local server (location1) to a remote server (location2). The purpose of the code is to copy a file from the remote server from a predefined location. In simpler ...
3
votes
1answer
53 views

Run a command in background that sets env var or define function

> export foo=1 & [1] 9016 [1] + done export foo=1 > echo $foo > I know when running a command with & you spawn a new process and the export foo=1 is not setting env vars in ...
1
vote
1answer
28 views

Setting environment vars containing space with env

I'm trying to use env to set environment variables (read from another source, say for example a file) for a subprocess. Essentially, I am attempting the following: env VALUE=thisisatest ...
2
votes
5answers
7k 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 ...
3
votes
3answers
167 views

Environment variables. Where are they saved in? [duplicate]

If I do not edit the .bashrc or other config files, the environment variables that I've setted are gone when I logout, or turn off the terminal. What I'm curious is, where are those 'temporary' env ...
2
votes
1answer
276 views

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

I have the below call to db2 database command line tool inside a loop, which runs 100k iterations. (the output from db2 is 5 rows of 20 chars approx per each call, total of approx 100k calls. The ...
0
votes
0answers
20 views

Why does not changing changing LC_ALL from utf to C speed up my grep?

I wanted to try to speed up my already fast grep. I read that changing lc_all from utf to c was supposed to do this. However, it gives no speedup. What might the reasons be? How do I "debug" this? ...
-1
votes
1answer
18k views

“not a valid identifier” when I do “export $PATH”

When I run export $PATH in bash, I get the error not a valid identifier. Why?
104
votes
7answers
23k views

Why is it better to use “#!/usr/bin/env NAME” instead of “#!/path/to/NAME” as my shebang?

I notice that some scripts which I have acquired from others have the shebang #!/path/to/NAME while others (using the same tool, NAME) have the shebang #!/usr/bin/env NAME. Both seem to work ...
11
votes
2answers
824 views

What is DISPLAY=:0?

What is DISPLAY=:0 and what does it mean? It isn't a command, is it? (gnome-panel is a command.) DISPLAY=:0 gnome-panel
75
votes
3answers
38k views

What does “LC_ALL=C” do?

What does the C value for LC_ALL do in Unix-like systems? I know that it forces the same locale for all aspects but what does C do?
3
votes
1answer
44 views

Question on environmental variable

I have Oracle jdk7 installed on my centos6. I noticed that the /etc/profile has the lines below: #below lines are added for Java export JAVA_HOME="/usr/java/latest" ## export JAVA_HOME JDK ## export ...
4
votes
2answers
5k views

Exporting a variable with dot (.) in it

How to export a variable which has dot in it. I get 'invalid variable name' when I tried : export my.home=/tmp/someDir -ksh: my.home=/tmp/someDir: invalid variable name Even escaping metacharacter ...
0
votes
2answers
54 views

What is the variable of $#?

I'm learning introductory Linux and came across something which I did not understand: "The following command has been executed: set 10 20 30 40 50 Enter the value of the variable $#: I understand ...
24
votes
6answers
9k 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 ...
0
votes
1answer
21 views

Linux environment variable using non-fullpath

I'm setting the environment variable LD_PRELOAD to a shared library file I created, in order to let LD_PRELOAD to point to my created shared library file, I need to give the full path like this: ...
16
votes
3answers
13k views

How to make unix service see environment variables?

I have set my environment variable using /etc/profile: export VAR=/home/userhome Then if I do echo $VAR it shows /home/userhome But when I put reference to this variable into the ...
1
vote
1answer
39 views

Loading .profile from .bash_profile or not using bash_profile at all? [duplicate]

I am on a MAC running Yosemite. Until recently, I only had a .profile, in which I added directories to my PATH. Now I have a .bash_profile, which from what I experienced and later read online, ...
1
vote
4answers
134 views

bash division of numbers in text file

I have two numbers in test.txt file, I would like a way to divide the second number by the first number and assign the result to a variable or file in a bash script that I can use. I have used awk ...