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

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0
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1answer
30 views

Restrict unix user from setting environment variables during the active session

I've a condition in which I want to restrict a unix user from setting up environment variables or modifying the environment variables locally during the user's active unix session. For example, if ...
1
vote
2answers
93 views

How can I use the environment variables inside a regular expression in awk?

#!/bin/sh ALTER="1153" NAME="aio" for i in $(ps -eo pid,etime,comm | \ awk -v alt="$ALTER" -v name="$NAME" '$2~/[^0-alt]-/ && $3~/name/{print$1} '); do echo $i done
7
votes
2answers
238 views

How to prevent the caller's shell from being used in sudo

I'm running sudo-1.8.6 on CentOS 6.5. My question is very simple: How do I prevent SHELL from propagating from a user's environment to a sudo environment? Usually people are going the other way- they ...
3
votes
1answer
80 views

Export a selection of environment variables with correct escaping

I want to export some environment variables which I set in a dash script to a file: myvariable="line 1 LINE=3 some characters: # \" \$ line 5" myvariable2="abc" export myvariable myvariable2 ...
0
votes
1answer
80 views

How to import self made modules in Python on Ubuntu 15.04

I just moved from windows 8 to Ubuntu 15.04. I do some programming in python3, and some programs rely on imports from self made modules. In windows all I had to do was add the directory which contains ...
4
votes
2answers
201 views

Why do `env var=value` allow arbitrary name in var?

Reading env POSIX documentation: Some have suggested that env is redundant since the same effect is achieved by: name=value ... utility [ argument ... ] The example is equivalent to ...
-2
votes
1answer
65 views

How to solve the defining variables in bash prompt command not found the problem

My Linux distributions centeros7, define variables on the bash prompt command not found [wanghao@localhost ~]$ al = nihao bash: al: command not found... [wanghao@localhost ~]$
5
votes
2answers
119 views

Using ~ in symlink target or making a symlink with a variable

I would like to create a symlink to ~/foo/ but when I write that, ~ is always resolved to the absolute home path. I've used ../s in the past and they work fine, is ~ not allowed? The reason I'd like ...
0
votes
1answer
36 views

environment file variable equals another variable [closed]

Is there a way to create an .env file that defines a variable with the value of another variable? I have tried using: var1=$var2 And it obviously doesn't work. Any takes?
1
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2answers
75 views

Cannot run command inside bash variable including square brackets with nullglob

Assuming I want to run commnand stored inside the variable with nullglob turned on. For example: shopt -s nullglob a="echo [foo]bar" ${a} This gives me an empty output due to the nullglob option of ...
1
vote
1answer
58 views

Indirectly expand variables in shell

I need to indirectly reference a variable in the bash shell. I basically want to what you can do in make by writing $($(var)). I have tried using ${$var} which would be the most straight forward ...
1
vote
2answers
69 views

use an export variable as part of filename in awk program

I have set an export X25DATAF=/home/Bob/X25/Datafiles in my profile and that's what is outputted when I do a echo $X25DATAF. I want to replace /home/Bob/X25/Datafiles in the awk below with the ...
0
votes
3answers
60 views

how to add these 3 lines as enviroment variables to .profile bash file

How do I add these 3 lines into .profile as environment variables: BBSCONFIG /home/tony/majorbbs.cfg BBSDISP xwindow DISPLAY hostname:0.0
0
votes
2answers
73 views

Why does my change in .profile has no effect? [closed]

I have a Red-hat Linux box. I logged in as a user1 and made JBOSS_HOME variable change in .profile file. Previously It was: export JBOSS_HOME="/opt/home/user1/jboss-eap-6.1" Now I changed it to: ...
3
votes
2answers
180 views

Complete view of where the PATH variable is set in bash

I've read in a couple of places that the PATH is set in /etc/profile or the .profile file that's in the home dir. Are these the only places that the path is set in? I want a better understanding of ...
1
vote
1answer
72 views

Why isn't “export” permanently chaning my environment variables?

Running Fedora 20. Trying to permanently set the LANG and LC_TIME variable with "export". When I run it, it works fine and I can see it was changed. When I reboot, it gets changed back. I am doing all ...
4
votes
1answer
247 views

LD_LIBRARY_PATH environment variable

I am trying to test the LD_LIBRARY_PATH environment variable. I have a program test.c as follows: int main() { func("hello world"); } I have two files func1.c and func2.c: // func1.c #include ...
0
votes
1answer
61 views

How to create a module on a CentOS cluster [closed]

I would like to create a module on a CentOS 6 cluster (e.g. module load gcc-4.7.2). Basically, I have no clue how modules work. Are there any good tutorials illustrating this or could someone ...
0
votes
0answers
18 views

Environment Variable not Exporting [duplicate]

I have this script that I'm writing, basically as my own free dynamic dns system (with a bit more manual-ness at the moment). Here it is: #!/bin/bash ...
0
votes
1answer
97 views

Pass environment variables to clean chroot in Arch

I am writing a PKGBUILD for Arch Linux. The package is large and compressing/uncompromising it take considerable time for limited space savings and I would like to turn it off while I am writing the ...
0
votes
0answers
81 views

How do I send a variable through SSH so it can be used across servers? C Shell

EDIT: Would this be possible in bash? Note: I have to use C shell. (.csh) I have something very similar to the following code: set var = "string" ssh -X server "$var" << END * I ...
0
votes
4answers
188 views

Unable to add folder to PATH in .profile file

The following is my .profile file: # ~/.profile: executed by the command interpreter for login shells. # This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login # exists. # see ...
4
votes
2answers
254 views

Where is the `$TERM` environmental variable set in Debian Jessie for console logins?

I have read a lot of articles and SE questions regarding how and where the default $TERM environmental variable gets set. Unfortunately in Debian 8.1 I can't seem to find where the default $TERM ...
0
votes
2answers
41 views

How to pass an environment variable when change rooting?

I don't seem to be able to pass an environment variable to a chroot: $ sudo apt-get install debootstrap dchroot $ sudo debootstrap trusty mychroot $ sudo chroot mychroot /bin/bash -c "MY_VAR=5; echo ...
0
votes
1answer
260 views

Bash - check environment variables

The env command can be used to print environment variables in bash. I want to ask if there is any built-in command to do this ? $ export temp="hello world" $ env | grep temp The second command ...
2
votes
1answer
202 views

Bash - shell vs environment variable [duplicate]

I want to clarify a confusion I am having in shell variable vs environment variable. I did the following test, where I have a shell variable abc and export it to an environment variable. $ $ ...
1
vote
1answer
594 views

How set environment variable permanently in Red Hat Linux?

As I'm using Red Hat Linux 5.3, I'm unable to set environment variable permanently. I want the file names for csh, from which I can add the environment variables permanently.
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votes
1answer
125 views

How can I delay the evaluation of variables (lazy evaluation)?

For example, I create 32768 directories named 0,1,2,...32767. I want to randomly choose one as the path every time I run a command. So I change $PATH to $PATH:/blabla/$RANDOM, but it won't work ...
7
votes
1answer
659 views

Bash: How many nested sessions deep?

Say I start a bash shell, ...and then another bash session from within that shell, ...and then another bash session from within that session, ...and then another bash session from within that session, ...
2
votes
1answer
75 views

how to set Internal Variables in mailx in linux?

save internal variable enable saving of messages in the dead.letter file on interrupt or delivery error.The default is save. problem: default is save so dead.letter file is created at home directory, ...
1
vote
1answer
549 views

Get value of environment variables in for-loop

I have several environment variables pam_branch app_branch worker_branch I use an array to define different projects and I want to get the values of these environment variables by rebuilding them ...
46
votes
4answers
4k views

Is there ever a good reason to run sudo su?

To launch a root shell on machines where the root account is disabled, you can run one of: sudo -i : run an interactive login shell (reads /root/.bashrc and /root/.profile) sudo -s : run a non-login ...
0
votes
1answer
123 views

What is the perfect combination of Environment Variables for Tomcat? [closed]

I hosted one application UI in apache-tomcat server. I had set environment variables in bin/setenv.sh file as: CATALINA_OPTS="-server -Xms256m -Xmx512m -XX:PermSize=512m -XX:MaxPermSize=1024m Every ...
2
votes
1answer
190 views

Finding out what sh is [duplicate]

I am writing a set of scripts that I want to be portable, but I need to know whether sh on the current platform stands for bash, ksh, or ash. Is there a clear way to do it? What comes to my mind ...
4
votes
1answer
1k views

Why does bash parameter expansion not work inside systemd service files?

I am trying to use systemd's EnvironmentFile and add an option to the command when it is set in the file. I have the following in the unit file: ExecStart=/usr/bin/bash -c "echo ${PORT:+port is ...
1
vote
1answer
8k views

Set environment variable $PATH globally on Ubuntu 14.04

I am trying to add environment path variable of composer globally. I've tried many ways but it does not seem to work. I searched other posts, but did not find matching answers. I am trying to ...
0
votes
1answer
108 views

When I execute a .run file as <user> it works fine. If I sudo run it, it cannot detect Java

I am trying to execute a .run file that will install some applications. I'm installing the application in /opt/... When I run it without sudo, the installer runs correctly but cannot write to /opt/. ...
1
vote
6answers
111 views

How can I pass an environment variable to a script?

Okay, I can display an environmental variable from the commandline: echo $COLUMNS And get a response. But I can't execute that from within a shell script, I get nothing. So, there must be a way to ...
6
votes
1answer
116 views

Bash: How to avoid variable name substitution when using auto-completion?

I'd like Bash to stop removing variable names from paths and replacing them by their values. I tried several 'shopts' settings in various bash versions but was not successful in keeping a variable ...
2
votes
1answer
217 views

Updating environment variable in a shell script

I am trying to update the value of an environment variable in a third party shell script. My OS is Oracle Linux Server release 6.4 (Red Hat Enterprise Linux Server release 6.4 (Santiago). I already ...
2
votes
2answers
746 views

Configure tmux to use zsh

Right now I have my iTerm session configured to use zsh (/usr/local/bin/zsh), but I'm trying to configure tmux to use zsh as well, instead of /bin/bash/, which it's currently defaulting to. So far ...
3
votes
2answers
820 views

Where do EDITOR, PAGER, BROWSER environment variables come from?

When I look in man bash none of these are defined. However, random posts online refer to them; where do they come from? Or are they just a convention?
0
votes
1answer
40 views

OracleSolaris 11.2 - setting MANPATH variable

What is the right way to extend MANPATH in Solaris? Currently it is empty for a user session, so I get to do it manually in $HOME/.bash_profile: ...
3
votes
3answers
359 views

What's the 'right' format for the HTTP_PROXY environment variable? Caps or no caps?

I've encountered both http_proxy and HTTP_PROXY. Are both forms equivalent? Does one of them take precedence over the other?
1
vote
1answer
70 views

How to switch java environment for specific process?

I use openjdk in my work, but sometimes I need oracle's jre or even specific version of oracle's jre. As I know, I should update JAVA_HOME value and /usr/bin/java or /etc/alternatives/java link ...
0
votes
1answer
126 views

How to change JAVA_HOME temprorary with env command

I use openjdk for my work, but sometimes I need oracle's JRE. I thought that I could use 'env' command for this, but can't figure out why it's not working. I have openjdk in ...
2
votes
1answer
146 views

Magic environment variables in gnome-terminal

I had installed a proxy software (cntlm) on my machine. It sets the environment variable http_proxy to 127.0.0.1:3128. Now I've uninstalled the program using apt-get remove cntlm. However I'm able ...
1
vote
1answer
255 views

How to append to an environment variable using an .env file?

Assuming the .env file is loaded before execution, how can you append to it without overriding it? DEBUG=True FOO=BAR PYTHONPATH="/Users/James/project/" The above file would (?) override it, and ...
0
votes
2answers
110 views

Does kali distro not use /etc/environments file?

I appended a path to /etc/environments file and now it is like so: mindaugas@Kali:~$ cat /etc/environment | tr ":" "\n" PATH="/usr/local/sbin /usr/local/bin /usr/sbin /usr/bin /sbin /bin /sbin" I ...
1
vote
1answer
73 views

How do I add an installed program to my PATH so I can run it from the command line?

I installed jsx using npm: npm install -g jsx Now it installed jsx in this path: /node_modules/lib/node_modules/jsx/bin In the bin, I'm having jsx. Now if type ./jsx, it works fine as expected. ...