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

learn more… | top users | synonyms

4
votes
1answer
25 views

System environment variables not appearing in sudo

I have the following line my /etc/environment file: BROKER_URL=tcp://xxx.30.8.163:61616 I run this and get: $ set|grep BROKER_URL BROKER_URL=tcp://xxx.30.8.163:61616 Then, I run: $ sudo bash # ...
14
votes
7answers
421 views

How do I source another process's environment variables?

If I examine /proc/1/environ I can see a null-byte-delimited string of process 1's environment variables. I'd like to bring these variables into my current environment. Is there an easy way to do ...
3
votes
1answer
30 views

Set environment inside `nsenter /bin/bash`

I'm entering a namespace with nsenter -m -u -i -n -p -t $PID /bin/bash. However, printenv inside this namespace doesn't have everything I need. I'd like to send these variables in, but I'd like to ...
3
votes
2answers
49 views

184 environment variables too many?

I am trying to find the cause of some OS wonkiness, and am concerned about environment variables. The software I have been handed puts an incredibly high amount of environment variables into the ...
1
vote
1answer
48 views

Is the $HOME environment variable always set on a Linux system?

Assuming the machine is running a Linux kernel, sessions make use of the Bash shell and everything is using default configurations (no user has made any changes to config files), can we assume that ...
2
votes
2answers
41 views

What is the difference between env and printenv?

What is the difference between these two commands (env, printenv), which both shows the environment variables? They output same contents by default except '_'. And any historical reasons for two ...
5
votes
3answers
181 views

Understanding environmental variables in different contexts

Trying to understand the behaviour of the environment in Linux (Ubuntu 13.04 concretely), I've find different situations where setting envirionment variables are used or defined for/in different ...
1
vote
0answers
26 views

Setting environment variables at runtime in KDE4

Is it possible to set an environment variable at runtime, affecting all the programs started from the DE after that point (Desktop Environment, in my case KDE4) (without rebooting)? I know it it ...
0
votes
2answers
44 views

How can I ensure that a custom environment variable is set before cron runs a task?

I recently experienced a logwatch issue that is fixed by running export DATE_MANIP=DM5. cron seems to forget this when I logout (presumably because it's not saved). Where can I add this custom ...
2
votes
4answers
87 views

bash script and local env variable namespace collision

I have a bash script with a variable called VAR_A I also have a local env variable called VAR_A The bash script calls the command: echo ${VAR_A} I am not able to change the variable in the script ...
1
vote
1answer
48 views

How can I set up environmental variables for www-data?

I asked a question on dba.se about how I can give my Perl CGI script the password it needs to access the MySQL database it needs to query. I have received only one answer but that one suggests I save ...
2
votes
3answers
59 views

setting environment variable as a function of another env variable [duplicate]

I would like to set an environment variable (that we'll call "TEST") to store the path to a sub-directory of my home directory : something like /home/myself/dir/. I would like to use the $HOME ...
2
votes
2answers
43 views

What does `env COLUMNS=%S ps …` do?

I have seen the syntax env COLUMNS=%sin shell scripts, e.g. see the line below from the Helm package in Emacs: env COLUMNS=%s ps -axo pid,user,pri,nice,ucomm,tty,start,vsz,%%cpu,%%mem,etime,command ...
4
votes
3answers
65 views

Why does export -p exclude $_ variable?

As far I know, there are 3 ways to see exported variables: $ export -p | wc -l 50 $ env | wc -l 51 $ printenv | wc -l 51 As you can see, export -p misses single variable. It's a $_ one: $ diff ...
4
votes
2answers
318 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 ?
1
vote
1answer
32 views

Who is setting http_proxy?

On an Ubuntu system with bash as the default shell for the interested user, the http_proxy environment variable is set to a specific value in a fresh GNOME Terminal. The .bashrc file for this user ...
2
votes
2answers
47 views

Using environment variabless 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 ...
2
votes
1answer
54 views

Where do I place commands to automatically be exported for all users?

I have an embedded platform running an Arago linux distribution. Right now the only "user" is root but there will eventually be others, but I don't know how many or what user IDs they will have. ...
0
votes
1answer
21 views

Permanent Environment Variable with # linux Ubuntu

I am trying to set some environment variables permanently by editing the /etc/environment file. One of my environment variables has a "#" in it and some text after the "#". Everything after the "#" ...
0
votes
1answer
38 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 ...
1
vote
1answer
40 views

Restricting grep's --color option to the interactive shell

I have the following variable I want to set to make grep behave a certain way: GREP_OPTIONS=--color=always The problem is, I only want this environment variable to be set on the command line. I ...
1
vote
2answers
57 views

cd ${DIR_PATH} returns 'No such file or directory'

OS = MacOS 10.8.5/Darwin Kernel Version 12.5.0. In my .bash_profile I have: export DIR_PATH=~/concrete/path At the terminal >echo ${DIR_PATH} ~/concrete/path Also explicit cd works: ...
3
votes
2answers
56 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. ...
1
vote
1answer
55 views

$@ and 'set env $PATH' - Why should this statement go into .inputrc?

I have a line in my .zshrc that says: set env $PATH Apparently this affects the value of $@. I have read that $@ should be empty and that I should not have any set statements in my .zshrc (at least ...
5
votes
2answers
152 views

Local variables in zsh: what is the equivalent of bash's “export -n” in zsh

I'm trying to contain the scope of a variable to a shell, and not have children see it, in zsh. For example, I type this in .zshrc: GREP_OPTIONS=--color=always But if I run a shell script with the ...
1
vote
2answers
41 views

Environment variable for command called via nice

I need to set an environment variable for a command that is being called via nice. [Bash and dash, Slackware and FreeBSD.] $ JIM=20 nice -n 10 echo $JIM $ Nope, echo can't see JIM $ nice -n ...
3
votes
1answer
33 views

How to read value of variable, where the name of variable is the value of another variable

I think an example is in order. Consider I have these two environment variables setup (by a Continuous Delivery tool): PACKAGE_VER=1.2.3 and USE_VERSION_FROM=PACKAGE_VER. What I want now is a script ...
2
votes
1answer
58 views

How to set environment variables under MATE?

I have just installed MATE under Ubuntu Saucy. No problems. Except I am trying to setup Texmaker, the LaTeX IDE, and cannot figure out how to set the paths to the LaTeX tools (pdflatex, etc.) which ...
1
vote
3answers
114 views

HowTo Chroot to BSD

I recently tried FreeBSD [9.2]. I installed it but as i found out it doesn't install any bootloader by default. So now i want to find out HOW it is possible to chroot to the installed BSD via a ...
3
votes
3answers
221 views

How do I create a GUI application launcher for xfce4-terminal with fish but inheriting the environment variables from bash?

If I run fish from a bash prompt, it will inherit the environment variables I have set in my .bashrc and .profile files, including the important $PATH variable. So far so good. Now, I want ...
3
votes
2answers
87 views

Expansion of a shell variable and effect of glob and split on it

This post actually contains two separate questions but I think grouping them together will give some more context. I have gone through this question on quotes around variables but I do not quite ...
2
votes
2answers
77 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 ...
0
votes
3answers
90 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 ...
8
votes
2answers
168 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 ...
2
votes
1answer
82 views

local shutdown scripts (do's and don't's)

At work, I'm running linux, and use vagrant on a daily basis. What I find annoying is that the system often hangs when I reboot/shut down, if I forgot to vagrant halt any virtual boxes I may have ...
2
votes
2answers
93 views

From where does printenv command read environment variables which I have not defined?

The printenv command lists a number of environment variables most of which I have not defined. From where does it read these values? Where are the environment variables stored in Linux? strace ...
1
vote
2answers
100 views

How to loop through xargs where each script uses a common env variable

Is it possible to initiate 10 of the same shell scripts which also initiate more copies, and have them all use the same env variable? For example: script.sh: #!/bin/bash export ...
0
votes
1answer
47 views

ENV variables in relation to xargs loops

Are env variables (set using export) treated differently when the same script is run multiple times simultaneously? That's a weird question, so here's an example I built out which is similar to my ...
0
votes
0answers
66 views

Application does not see environmental variables

I am running following 32 bit command on 64 bit system: LIBGL_DEBUG=verbose glxinfo32 -v -t | head -5 It's output says direct rendering: No (If you want to find out why, try setting ...
1
vote
2answers
36 views

Running a program to output in Dutch

I'm running KDE Arch linux and trying to update my system using pacman and have it output in Dutch. I've tried the following sudo LANG=nl_NL.UTF-8 pacman -Syy sudo KDE_LANG=nl_NL.UTF-8 pacman -Syy ...
-3
votes
1answer
60 views

where is this HOME environment variable and what do I have to add -H too it?

I recently attempted to run a boot up script which failed I didn't know why it failed so I posted a question about that here. chkconfig bootup script failing, script runs good manually Where the ...
2
votes
1answer
32 views

How to avoid warnings from subshells if the function in PROMPT_COMMAND is not defined?

I'm using the following code to get a nice prompt (including git information etc.): function set_prompt { # magic happens in here ;) } export PROMPT_COMMAND='set_prompt' However, sometimes I ...
1
vote
2answers
83 views

modify user-defined System Variables(that is a number) of remote Server machine using ssh?

I want to modify the value of a System Variable of a remote server . The IP of server is 172.16.22.53. The server runs Windows OS,and Cygwin instlled in it.In ...
2
votes
1answer
74 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
1answer
81 views

bash set env variable is not working in pdsh

I am using PDSH to control multiple servers through one command line. The command below works fine on individual servers, but when I enter the export command within PDSH, echoing it back is empty. ...
5
votes
4answers
132 views

How do I use which(1) with the system's default $PATH?

I would like to use which with the system's default path, ignoring any embellishments from the user's shell configuration files. Motivation I am attempting to write a script to find the system's ...
1
vote
1answer
53 views

exported variable disappears when I open a new terminal

I type this: export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk so that I can access that directory by typing cd $JAVA_HOME but every time I close and open the terminal I have to do this again and ...
1
vote
1answer
65 views

How to retrieve environment variable from string name in KSH

I've the following variable : x="envVar" and 'envVar' is the one of my environment variable's name containing a path (of a folder by instance). So I'd like to do cd $x but it doesn't work. ...
1
vote
3answers
549 views

Set environment variable automatically upon SSH login (no root access)

The situation: I run Ubuntu 12.04 LTS on a virtual machine. I regularly have to connect to my account on a university server, I do this by opening up terminal and using ssh -Y username@server.com. ...
2
votes
2answers
724 views

rkhunter warn me about root.rules

I run : :~$ sudo rkhunter --checkall --report-warnings-only One of the warnings I've got : Warning: Suspicious file types found in /dev: /dev/.udev/rules.d/root.rules: ASCII text and ...