Tagged Questions
1
vote
2answers
70 views
How to print shell variables and values to be able to copy/paste them?
In Bash 4.2.25, the set and env output is not escaped, so shell escapes and any non-printable characters won't be copy-pasteable. Take for example this shell session:
$ export foo=$'a\nbar=\baz'
$ ...
-2
votes
1answer
51 views
Paths in my bash profile do not work!
export PATH=/usr/local/bin:/Users/rodrigoprugue/Desktop/CRUNCH:~/phreeqc/bin:$PATH
export PARFLOW_DIR=~/parflow/parflow.r605/
export SILO_DIR=~/parflow/silo-4.7.2/
export ...
4
votes
4answers
131 views
Detecting X session in a bash script (.bashrc etc.)
Recently I put xset b off to my .bashrc. Now I'm annoyed by the error thet pops up when I log in via tty or via ssh, i.e. outside X session.
First thing that came in my mind was [[ -z "$SOME_VAR" ]] ...
2
votes
1answer
60 views
How to print apparently hidden environment variables?
Environment variables can be shown with env; but, some are not shown. For example...
echo $EUID might produce as result of 1000 yet
env | grep EUID produces no result.
What is this type of variable? ...
1
vote
2answers
114 views
How do I set an environment variable for sudo in MacOS?
I have installed ServiceMix on my machine, and am trying to start it. The startup script is called start.sh. When I did ./start.sh, it gave me a Permission Denied message. So I used sudo ./start.sh, ...
2
votes
1answer
209 views
Users home path in a bash script
I'm writing a bash-script that will be run as a cron job everyday. Very basic, I was wanting to change the wallpaper daily. I have mint-14 with mate.
The thing I'm getting caught up on right now ...
1
vote
2answers
111 views
OS X setting environment variables
I have OSX 10.8.2 with ZSH as my shell and iTerm as a terminal (don't know if the last thing is relevant). I have to mention that I'm relatively new to OSX.
I'm trying to set up some environment ...
2
votes
1answer
257 views
How to run Steam from the Xfce desktop?
I've installed Steam on Debian 7.0 without any hassle, and I can run it by typing steam &.
I've set it as a desktop launcher in Xfce, but when I ran it, nothing happened.
Then I've check the ...
1
vote
1answer
114 views
Environment auto-install script
When I work, I often have to switch computers or virtual machines which means that every time I switch, I have to set up my (Linux) environment again.
Is there a tool (in contrast to a simple bash ...
2
votes
3answers
98 views
Bash - setting environment vars from bash invocation line
I'm looking for a way to manipulate some env var, which will be available for processes spawned by bash.
Something like the below (of course, the syntax is not correct)
/bin/bash VAR_X=2
and then ...
3
votes
2answers
239 views
Environment variable set but not respected
I find the following behavior a little confusing, can someone please explain why it happens?
In /etc/bash.bashrc I have:
EDITOR=vim
And it is indeed set:
lev@home ~ $ echo $EDITOR
vim
I would ...
5
votes
1answer
271 views
Difference between environment variable and shell variable
It is said that environment variables are inherited in child processes but shell variables are not. However the following test shows shell variables are seen in child process just as environment ...
7
votes
2answers
297 views
How can I create a clean shell environment for temporary use?
I am a frequent answerer on a Unix-focused popular Q&A site, and in many of my answers I provide examples using the bash shell. However, each time I do this I have to manually go through the ...
3
votes
0answers
100 views
tab-expansion and “./” bash shell [closed]
Maybe someone here would be able to help me out. Have installed Ubuntu 12.04 LTS (kubuntu) on two machines. The .bashrc and .bash_profile files are identical as the file structures on each machine is ...
3
votes
3answers
288 views
Bash shells with different environment variables
I want to somehow enter a different bash shell with some altered environment variables.
For example, if I run script bfin.sh and it contains something like
export PATH=/home/me/bfin2012:$PATH
I ...
4
votes
2answers
165 views
Inhibit Variable Expansion in Paths
How do I prevent Zshell (and Bash I assume) from expanding environment variables in paths be completed as shown in the following example:
$PREFIX/alt/li
should expand to
$PREFIX/alt/lib
and not ...
8
votes
2answers
366 views
How to run a program in a clean environment in bash?
I want to run a program in an empty environment (i.e. with no envariables set). How to do this in bash?
5
votes
2answers
236 views
Run a script automatically as I switch to a directory [duplicate]
Possible Duplicate:
Execute bash scripts on entering a directory
I am running an environment which requires some very specific tool versions.
The commands to set up the environment are in a ...
0
votes
2answers
4k views
How to set environment variable JAVA_HOME that will be saved on exit? [duplicate]
Possible Duplicate:
How do I set a user environment variable? (permanently, not session)
I use Suse. First was installed jdk7, so JAVA_HOME remains like:
/usr/java/jdk1.7.0_05/
After I ...
8
votes
2answers
1k views
What is the difference between ~/.profile, ~/.bashrc, ~/.bash_profile, ~/.gnomerc, /etc/bash_bashrc, /etc/screenrc …?
Answers to the questions on SO and askubuntu, along with poking through (and reading headers of) $HOME and /etc/, indicate a number of files that can be used to set environment variables, including:
...
0
votes
1answer
145 views
Fedora 7 server export in .bashrc not getting set
I'm trying to set the JAVA_HOME environment variable in my .bashrc but every time I log back in it gets unset again to its original value, below is my .bashrc file
# .bashrc
# User specific aliases ...
1
vote
3answers
277 views
Accessing bash [internal] brace expansion iteration number/variable
Question:
Is it possible to access which number of a bash iteration is currently being processed?
Psuedo-Command
mv {1..5}.something.{1..5} $x1.$x2.something
Note: This is a logical ...
0
votes
2answers
94 views
Way to determine where certain global parameter is configured [duplicate]
Possible Duplicate:
How to determine where an environment variable came from
I wonder if there is a way to determine the location of the file where certain configuration exists. For example ...
0
votes
2answers
945 views
Trying to set JAVA_HOME in ~/.bashrc
I have added this line at the end of ~/.bashrc file.
export JAVA_HOME=/usr/java/jdk1.5.0_07/bin/java
But when I do echo $JAVA_HOME I don't get anything as output, I expected ...
1
vote
4answers
212 views
Exporting environment variable
I am having some problem with bash. I want to export an environment variable whose value contains a variable but I don't want that variable (which is within the value) to be evaluated during the ...
1
vote
2answers
123 views
Variable name from command output
I have some string, and want to split on colon ":" assigning on variable with name from left part and value from right part. For example:
echo "Title: Some title" | sed 's/:.*//'
gives me wanted ...
0
votes
1answer
182 views
Shell script executing in the terminal but not from shell script file [duplicate]
Possible Duplicate:
How can I make variables “exported” in a bash script stick around?
I have a problem with executing script from file. When I type in command line
...
4
votes
2answers
2k views
Set Variable Environment Variables in bash (or other)
I want my script to read a file containing key/value pairs of environment variables to set, and then to set them.
So far, I have this:
#!/bin/bash
cat $1 | while read kv
do
key=${kv%=*}
...
5
votes
1answer
491 views
How can I make variables “exported” in a bash script stick around?
I have multiple Amazon EC2 accounts and want to quickly be able to switch variables, such as $EC2_HOME, using a script.
I have have a shell script set up like this:
#!/bin/sh
export ...
9
votes
4answers
2k views
Script to change current directory (cd, pwd)
I want to run a script to simply change the current working directory:
#!/bin/bash
cd web/www/project
But, after I run it, the current pwd remains unchanged! How can I do that?
4
votes
2answers
5k views
Refresh env variables after editing bashrc file
I frequently edited the .bashrc file to export new environment variables.
Rather than close the console and start a new one to refresh the env variables, is there a convenient way to refresh?
2
votes
1answer
837 views
Why my $PATH is not inherited by the invoked bash?
I work on an AIX system where I have no administrator privileges. It has several shells installed, default being tcsh. I am not allowed to change the login shell. Usually I start my session from exec ...
29
votes
4answers
36k 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 ...
2
votes
1answer
134 views
Why does this variable have no value even though it is set in .bashrc?
If I append this:
hi=11
export hi
to the .bashrc and then I su to this user with:
su - bela
then I:
echo $hi
11
Then it's working, the "hi" variable has the value of "11". But. When I:
...
2
votes
2answers
122 views
Function to evaluate variables in BASH
Given a variable name is there a function that will print its value?
Often times I pass the name of a variable to a bash function and instead of doing the expansion while passing it I would like to ...
0
votes
1answer
259 views
Variable assignment in .bash_profile has no effect
I added the following to my .bash_profile:
JAVA_HOME=$JAVA_HOME:/usr/java/jdk1.7.0
export JAVA_HOME
However, when I echo $JAVA_HOME it outputs an empty string. Why weren't my changes to ...
4
votes
4answers
455 views
Last failed command in bash
The $? variable holds the exit status of last run command. Is there a variable that holds last run command itself?
4
votes
2answers
119 views
Why do newlines mess up my while condition?
I have a while loop that allows setting variables when written one way but does not allow it when written another way. Why is that? This prints var as 1234 and does not print var2
#!/bin/bash
...
6
votes
1answer
569 views
Where have I set my bash PATH?
I want to remove ~/bin from my PATH. I set it up months ago when Linux (Ubuntu) was very new to me, but I don't know how I added it...
Nothing shows up when I search all the files listed below.
...
3
votes
1answer
1k views
dot file not sourced when running a command via ssh
When I run my program interactively, it works fine:
ssh somehost
$ ~/some/path/somescript.py
When I run my program over ssh directly, it doesn't work. The variable PYTHONPATH is not set, because ...
2
votes
2answers
2k views
Multiple path environment variable setup lines with bash
I have very long export PATH=A:B:C .... Can I make a multiple lines to have more organized one as follows?
export PATH = A:
B:
C:
3
votes
5answers
1k views
ssh user@IP sh <command> missed environment variables
I use an approach
ssh user@IP sh [runme.sh]
to execute script remotely, this works fine. But I got one problem, that is in runme.sh, I can't get any envirnoment variables which are defined in ...
5
votes
4answers
7k 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, ...
12
votes
3answers
3k views
How to print all environment variables defined (but not necessarily exported) in bash
The bash builtin command set, if invoked without arguments, will print all environment variables, but also all defined functions. this makes the output unusable for humans and difficult to grep.
How ...
18
votes
4answers
1k views
Alternative to .bashrc
Is ~/.bashrc the only place where I can specify user specific ENV Variables, aliases, modifications to PATH variable, etc?
I ask because it seems that ~/.bashrc would be bash only...
15
votes
5answers
423 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 ...
