General :: Tricking Apps About Current Time With Environment Variables?

May 21, 2010

Sometimes it is possible to trick a Linux app by calling it like this:

HOME=/tmp/foo myapp

This would make myapp think /tmp/foo is the home directory, it won't try to get the user id, find its home directory via getpwent(). This is useful when myapp must be forced to dump some of its config files into a non-standard location different than ~.

A similar trick can be done like this: LANG=foo LC_ALL=bar myapp

This is useful when myapp needs to be called once with a different locale without having to make the change persistent by using the export bash built-in or even modify stuff in /etc/profile.

Is it possible to pull the same trick with time and date? The goal is to make an app use another time than the system ones. The final goal - to make timestamps that appear in logs/commit messages not being tied to the system time.

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General :: Any Other Ways To Set Environment Variables

May 20, 2010

I am running Red Hat Linux Enterprise 5; I am always using the export command to set environment variables.Are there any other ways to set environment variables and what are the advantages/disadvantages of them?

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General :: Environment Variables Not Being Set Correctly?

Jun 21, 2010

he $g09root is picked up ( in both the csh and the bash), but not the $GV_DIR or the $GAUSS_SCRDIR. I guess it's some stupid error, but it is highly frustrating.Here is the .profile file:Quote:

# To make use of this feature, simply uncomment one of the lines below or
# add your own one (see /usr/share/locale/locale.alias for more codes)
#

[code]...

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General :: Exporting Environment Variables In Ubuntu?

Jun 2, 2010

I know many people have asked about environment variables before, but I am having a hard time dealing with these paths while ensuring I don't mess around with the original settings. How would you go about executing these commands in Ubuntu in terms of environment variables?

put /home/stanley/Downloads/ns-allinone-2.34/bin:/home/stanley/Downloads ns-allinone-2.34/tcl8.4.18/unix:/home/stanley/Downloads/ns-allinone-2.34/tk8.4.18/unixinto your PATH environment; so that you'll be able to run itm/tclsh wish/xgraph.

IMPORTANT NOTICES:

(1) You MUST put
/home/stanley/Downloads/ns-allinone-2.34/otcl-1.13,
/home/stanley/Downloads/ns-allinone-2.34/lib,
into your LD_LIBRARY_PATH environment variable.

[Code]....

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General :: Setting (permenant) Environment Variables In 10.0.4

Sep 4, 2010

I am running an application which requires setting environment variables to be set.At the moment, the way I am achieving this is by exporting the EV at the command line, and then running the app from the command line.I want to be able to run the app from my menu (it is already a menu item after I installed it).How may I set the env var so that it is always available, so I can just run the app from the menu instead of from the CLI?

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General :: Use Environment Variables In The .bashrc File?

Apr 16, 2011

I am trying to include my directory /usr/sbin in it's serch path for executable files using an environment variable. Would the input be: PATH="/usr/sbin"? And also upon start up, my shell should create the PRINTER environment variable which should resolve to the word sales...would that input be: PRINTER="sales"? If someone could help me with these two questions,

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General :: Set Environment Variables That Use Everyday Permanently ?

Jul 13, 2010

I have bunch of environment variables that i have to set always for my work.Someone mentioned i can write a script to dp this and i googled it but haven't been successful so far and have to manually do them every time. I have a tcsh shell.I read that i need to change the .login or .tcshrc files but havent been successful in finding these.

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General :: Setup Environment Variables For Groups?

Jun 15, 2010

I can setup variables in ~/.bashrc for my own shells. I can also setup variables globally in /etc/bashrc.but then how do I setup variables for a group in Linux? So that users who belong to this group will see the variables, but not others?

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General :: To Export Environment Variables In A File?

Oct 27, 2010

I want to export the env variables in a file using a script,i tried using the below:for var in 'env'

do
var2=env|awk -F '=' '{print$1}'
echo "$var;export $var2">file.txt

[code]...

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General :: Concatenate Two Environment Variables In Bash?

Nov 9, 2010

How do I concatenate two environment variables in bash?

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General :: Xorg - Set Environment Variables For A Graphical Login?

Mar 18, 2010

I'm looking for a way to set arbitrary environment variables for my graphical login on linux. I am not talking about starting a terminal and exporting environment variables within the terminal, because those variables only exist within that one terminal. I want to know how to set an environment variable that will apply to all programs started in my graphical session.

In other words, what's the Xorg equivalent of ~/.bash_login?

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General :: Which Environment Variables Not Inherited By Bash Shells

Jan 2, 2011

I am using Linux some years, but since I built a LFS, I feel noobish again. Now with the help of BLFS I am setting up my environment and somewhere I incidentally read, that not every variable is inherited by a child Bash shell. As for the $PS1 and $PS2 variables I know, that they are not inherited by non-interactive Bash shells (and there is no reason why they should in my opinion). Well, as for my first thread I hope the title gives enough information on what I want to know. But anyways: Which environment variables are not inherited by Bash shells?

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General :: Set Environment Variables For A Particular User On C Shell Configurations?

Jun 2, 2011

I have been give a task of replicating one of our production systems to create a test system. I have been restricted to use c shell to set up its environment variables. I am new to this my questions is how do i set environment variables for a particular user on c shell e.g ORACLE_HOME and ORACLE_SID permanently for a particualar user i know in bash you edit the .bash_profile file. What do i do for c shell?

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General :: Changing Shell From C To Bash - Apps Or Variables?

Jun 21, 2010

I have a user that has been used for long time now that runs o C Shell... now there is a need to change it to Bash Shell? Can I cause a problem changing his shell from C to bash? I mean apps or variables?

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General :: Ubuntu - Setting Environment Variables Permanently Under GNU Systems

Aug 25, 2011

I was using the command export, but it looks that after some time the set variables disappears. What is the easiest way of setting an environment variable forever?

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General :: Cursor-based Interface To Change Environment Variables?

Sep 22, 2011

I often need to change a small part of long environment variable (especially, e.g., paths), and do it either by pasting the thing into an editor and changing it there, or the equivalent.

Is there some small convenience utility to edit environment variables with a cursor on the command line?

I suppose I could always whip one up, but am hoping there's already something that I'm just not aware of.

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General :: Change The Creation Time Of All A Folder's Files To The Current Time?

Jun 19, 2011

Under a Linux shell, how can I change the creation time of all a folder's files to the current time?

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General :: Environment Variable And Current Shell

May 24, 2010

I am using Red Hat Linux Enterprise 5. I know the theory that -- using export to set environment variable, the environment variable will apply to current and child environment, but without using export to set environment variable, the environment variable will only apply to the current environment. What is the exact definition of "child environment" and "current environment"? For example,

Code:
$ var1=123
$ echo "Hello [$var1]"
The value of var1 (which is 123) is printed in shell, but I think echo is a command invoked by current shell, and it (the echo command) should be a child environment of current shell and the value of var1 should not (because not using export var1=123) impact echo.

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General :: Set Current Directory As Environment Variable

Jul 10, 2010

How do you set current directory (full path) in an environment variable?

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General :: Environment Variable Containing The Current Keyboard Layout?

May 18, 2010

I have two keyboard layouts installed in my system and I need to determine in scripts which one I'm on. What the environment variable contains indicator of current keyboard layout?

Debian GNU/Linux 5.0.4;
GNOME 2.22.3.

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Fedora :: How To Set Environment Variables

May 18, 2010

I just installed valgrind on my Fedora12 machine.

$ valgrind // 1
$ valgrind: Command not found. //error
$ /usr/local/bin/valgrind // 2 works fine

[code]...

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Debian :: Python 2.7 Can't See OS Environment Variables

Aug 23, 2015

I'm trying to compile Ardour on jessie amd64 using the Debian source code (there's already an ardour package but I want to use different compile options). I've applied the Debian patches and have all the required dependencies installed.

Scons quits with a KeyError message from python2.7 saying that os.environ['DEB_HOST_ARCH_OS'] is not defined.

Checking with 'dpkg-archtecture -l' shows that DEB_HOST_ARCH_OS=linux, but 'print os.environ["DEB_HOST_ARCH_OS"]' in python says that name 'os' is not defined. The scons script has 'import os' at the top so it should be seeing it.

How do I make this visible to python (I'm assuming this problem is specific to the jessie python2.7 installation and not python in general)?

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Fedora :: Changing Environment Variables?

Oct 11, 2009

How do I edit my .bash_profile so recursive directories are on my path without manually typing all the directories? For example, I want to have /home/woodenbox/SU, /home/woodenbox/SU/bin, /home/woodenbox/SU/bin/src, etc on my path without actually having to write the paths for all the subdirectories

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Fedora :: How To Set Environment Variables Permenently

May 3, 2011

How to set JAVA_HOME environment variables permanently such that it will not have to be set each time it has to be used.

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Software :: Environment Variables And Konsole In KDE?

Apr 27, 2011

I have installed jdk in my pc, and i've set up the environment variable on the .bashrc file in my home directory although i can use java's compiler and interpreter in terminal (xfce) if i try to use these commands in konsole (kde) for some reason they don't work. do i need to edit other file?

Nevermind, i found out that konsole was being executed with -e $SHELL -l parameters, once i took them out, and just ran konsole everything worked.

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Software :: Set Environment Variables That Don't Need Terminal ?

Jun 12, 2011

I've added an export command to /etc/profile, but the environment variables don't show up when not using a terminal.

For example: when I add:

Code:

To my /etc/profile (then open a new terminal so it registers) and run a graphical program from that terminal, the graphical program can see see the environment variable A.

However if I add the export command to my /etc/profile, then reboot so everything registers, then run that same graphical program from a menu (such as Applications->Accessories->Myprogram), it can't see the environment variable.

What I'm trying to say is basically, my environment variables only show up if I run a program in a shell. Is there a way to set environment variables that will show even without a shell?

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Programming :: Using Environment Variables In Scripts?

Jun 19, 2010

Trying to mounts three cifs shares at boot up. I want to mount the shares under three different sub directories in the user's home directory:

share 1 mounted to /home/(insert username here)/movies
share 2 mounted to /home/(insert username here)/music
share 3 mounted to home/(insert username here)/software

I would like to use the environment variable HOME to dynamically build the mount point parameter. I've tried:

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Debian :: Unable To Change Environment Variables

Dec 17, 2015

I installed debian 8 on a usb drive using this guide. I used a debian 8.2 64-bit image with mate. It has all worked as I wanted it to. However recently I needed to change the PATH variable, and create another environment variable. I have not been able to do neither. What I have tryed (from google):

1. adding "export PATH=$PATH:/xxxx/" to etc/profile or to /home/user/.profile
2. adding ":/xxxx/" to a point in /etc/profile where the PATH variable is set
3. creating a script in /etc/profile.d which run "export PATH=$PATH:/xxxx/"

(where xxxx is the the location i want to add)

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Debian Configuration :: Environment Variables For All Users

Nov 27, 2015

I'm newbie on Debian, and I just installed Debian 8.2. (I used to run openSuse, and I see Debian is quite different.)

Where should I set environment variables (like PATH or JAVA_HOME) in order to affect all users?

I read some documentation about that, but It is not clear for me, the difference among "/etc/environment", "/etc/bash.bashrc" and "/etc/profile".

(In openSuse, I used to create a file "/etc/bash.bashrc.local" and set the environment variables there, in order these settings are not lost with updates.)

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Fedora :: Script Unable To Set Environment Variables

Nov 24, 2010

I've never done much scripting myself and I'm quite unused to the bash as well, but anyway, Here's my problem.

I've a script which is supposed to set some environment variables, using export. However, if I check those variables using echo, they appear not to be set (they are empty). If I set the same variables manually, everything is fine, of course, but I don't want to set them each time manually.

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