Questions tagged [environment-variables]

A set of dynamic variables that can affect the running processes behavior and access to resources.

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Set path to Eclipse

My Eclipse installer has installed Eclipse in ~/eclipse/cpp-oxygen/eclipse. But I don't have its icon in the Unity menu and command prompt doesn't see the eclipse binary. I have set PATH in .profile ...
Andrey Zakcharenko's user avatar
3 votes
3 answers
12k views

How can I find where the vim executable is located when my PATH is broken?

Looks like I crashed my system after editing /etc/environment and .bashrc files. My desktop doesn't start and I need to correct these files back. But since my system doesn't find any commands I need ...
vico's user avatar
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pig -version Shows error

deepak@deepak-Linux:~$ pig -version /usr/local/hadoop/bin/hadoop: line 166: /usr//bin/java: No such file or directory deepak@deepak-Linux:~$ echo $JAVA_HOME /usr/java/jdk-9.0.1 deepak@deepak-Linux:~$...
Deepak's user avatar
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1 answer
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/usr/sbin/update-info-dir: 1: /etc/environment: JAVA_HOME: not found

I'm trying to install nginx. By Running : apt-get install nginx it fails throwing a strange error saying that there is no JAVA_HOME Lokking to my /etc/environment file , it looks like this : ...
firasKoubaa's user avatar
11 votes
3 answers
5k views

Correcting path setting in ~/.profile file

There is a line in ~/.profile which is PATH="$HOME/bin:$HOME/.local/bin:$PATH"i I'm not sure about the last i. Should I remove it?? Isn't it a syntax error??
Smile's user avatar
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9 votes
3 answers
3k views

EDITOR environment variable changes after reboot

While running the less command, pressing v opens the file inside the editor. I have set the EDITOR environment variable to vi by running the command export EDITOR=vi. It works perfectly fine as ...
Smile's user avatar
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2 votes
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sudo su -l does not preserve environment variable [duplicate]

firstly, look at the snippet below: $ ssh -i ~/.ssh/ubuntu.pem [email protected] ubuntu@kingdom:~$ echo $PATH | tr ':' '\n' | grep sbin /usr/local/sbin /usr/sbin /sbin ubuntu@kingdom:~$ sudo su -l ...
Mr.'s user avatar
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PATH environment variable behaviour when switching user with and without login

when i login as a user then switch to another one, the PATH environment variable changes when the switch is done with and without login. see the following snippet $ ssh -i ~/.ssh/ubuntu.pem ubuntu@...
Mr.'s user avatar
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10 votes
3 answers
8k views

Equivalent to `setx` in powershell

Windows has a powershell command called setx which Creates or modifies environment variables in the user or system environment. Does Ubuntu has a similar command, i.e. not by using nano or vi, just ...
Ayman's user avatar
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Glade 3.20 seems to ignore `GLADE_CATALOG_PATH`

I have created a catalog with a custom widget and a custom group. If I set the GLADE_CATALOG_PATH variable and launch glade, the group and the widget are not shown. I have used both relative and ...
Phoenix87's user avatar
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3 votes
2 answers
13k views

How do I set environment variable for all users even when doing sudo su?

I created a file named x.sh in the directory /etc/profile.d/ so it should be accessible to all users. I expected when I change the current user in terminal (of logged-in user) using command sudo su ...
Soheil Pourbafrani's user avatar
0 votes
0 answers
3k views

No Java virtual machine could be found from your path

I am trying to install a program that is using Java, but it gets stuck when searching for the JVM. Running java -version I get openjdk version 1.8.0_151 My current $PATH parameter contains /usr/lib/...
munHunger's user avatar
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4 votes
4 answers
22k views

How to set "MKL_THREADING_LAYER=GNU" as an environment variable for a python script?

When I run a py script there is an error like this RuntimeError: To use MKL 2018 with Theano you MUST set "MKL_THREADING_LAYER=GNU" in your environement. I googled why and in the ...
Jieneng Chen's user avatar
1 vote
1 answer
262 views

Variable not stored while executing bash commands via gnome-terminal

I have a plugin that generates and copies to the clipboard a ready-to-paste command which then creates a file that I want to move and rename via user input. If I use this to get the latest modified ...
MonkeyBack's user avatar
59 votes
2 answers
84k views

DEBIAN_FRONTEND environment variable

My potential hosting provider suggests to run a command in the terminal in order to make KVM based server's OS image minimal. Since their KVM templates come with packages I will not need, I thought I ...
Asarluhi's user avatar
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$PATH: Seemingly several definitions, and yet unable to modify it

For a while now I've been struggling to deal with my $PATH variable but up until now I've always given up on it. This time, I've had enough, and after scouring AskUbuntu I can't find anything that ...
R. Barrett's user avatar
3 votes
2 answers
1k views

Environment variable

I need to install a software called silico.In that software it says Copy the Silico directory tree to an appropriate location Set the environment variable SILICO_HOME to point to the silico directory ...
A. G's user avatar
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How do I fix "MANPATH: undefined variable." in csh?

I am installing some open source software by compiling its source code -- on Ubuntu 16.04 -- by following the instructions in its 'readme' file. At certain point (point 3b in the link) the guideline ...
Ather Cheema's user avatar
10 votes
2 answers
6k views

Why aren't variables like $PS1 in printenv?

From what I can tell printenv displays environment variables, but why don't I see other variables like PS1 for customizing the shell prompt? What exactly is printenv outputting and why doesn't it ...
AJJ's user avatar
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cd /var/www/html/ error

I am Trying to install angular4 but in the process I type this command: cd /var/www/html/ As referred by the video but the error showing is this: bash: cd: /var/www/html/: No such file or directory
Harshal Pulekar's user avatar
3 votes
1 answer
2k views

Can't cd to newly added Path variable [duplicate]

I added the following line to /etc/environment: ML="$HOME/ml" After I re-logged in for the script to take effect, running printenv ML prints $HOME/ml and running cd $ML prints bash: cd: $HOME/ml: ...
Tran Triet's user avatar
0 votes
1 answer
1k views

Where is the NiViewer in Ubuntu 16.04 LTS?

I am pretty much new to Ubuntu file and directory system. I installed OpenNi2 using sudo apt install libopenni2-dev but now could not find the NiViewer executable to test the installation. I looked in ...
Sumit Sarkar's user avatar
6 votes
1 answer
20k views

UBUNTU 16.04: How to set JAVA_HOME for Java?

I am following this How to set JAVA_HOME for Java? in order to set the environment variable JAVA_HOME to the correct version. I have different versions of java in my /usr/lib/jvm/folder as ...
emax's user avatar
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1 answer
7k views

JAVA_HOME variable shows a blank line on the terminal

I'm using Ubuntu 16.04 64-bit. I'm logged in to Ubuntu as user1. I installed Oracle JDK version jdk1.8.0_144 to /usr/local/java and set symlinks as $ sudo update-alternatives --install "/usr/bin/java"...
kovac's user avatar
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8 votes
1 answer
3k views

What is the difference between env, declare and compgen -v?

I see that printenv and env are giving the same output. When digging further for getting the complete list of environment variables, I found declare -xp and the command from here: compgen -v | ...
surendra nath's user avatar
1 vote
1 answer
1k views

How can I get bash to evaluate a PM2 command stored in a Variable?

I'm setting up a server config with cloud init and am running commands one after another in the config file. One of the commands I need to run to setup my server's environment is PM2 to keep a node ...
Jonathan002's user avatar
0 votes
0 answers
5k views

setting a permanent environment variable

I am trying to permanently add an environment variable in ubuntu 16.04.3 LTS. I have tried many of the online solutions but none are working. I have tried adding: export PLINK_PATH=/usr/local/bin/...
swirlydino's user avatar
-2 votes
3 answers
10k views

Help adding directory to PATH environment variable in Ubuntu 16.04

How do I add "/home/me/pycharm-edu-4.0/bin/" to my PATH environment variable? I've tried what's in How to set $PATH in Ubuntu and What is the PATH environment variable and how do I add to it? but I ...
Savin Wales's user avatar
17 votes
1 answer
60k views

How to set LD_LIBRARY_PATH permanently?

I am using Ubuntu 16. I want to use cfmid for my project. When I set LD_LIBRARY_PATH in terminal, I can get output of the cfmid library: export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/lclab/installed/...
Kaushali de silva's user avatar
0 votes
0 answers
113 views

Change Environment variables through sudo script

I have a script script_xy.sh, which I have to execute via sudo. In this script I modify environment variables and when I add the line source ${BASHRC} nothing happens, because it doesn't refer on the ...
h0ch5tr4355's user avatar
-1 votes
3 answers
2k views

Unable to set JAVA_HOMEin Ubuntu with space in path in /etc/environment

I am annoyed trying this but all I am trying to do is set JAVA_HOME in /etc/environment file in Bash shell on Windows which is being offered now with Windows. My local Java is at C:\Program Files\Java\...
user3044240's user avatar
1 vote
2 answers
4k views

Stuck in login loop due to change in Path variable

The output of echo path is: /home/adarsh/Downloads/android-studio/gradle/gradle-3.2/bin:/snap/bin I was trying to add gradle to my path variable but unknowingly I made some mistake, next time I ...
A Akshat's user avatar
1 vote
1 answer
1k views

Reset python from 3 to 2 after anaconda modified PATH

I've installed anaconda and last thing it asked was if it could change the path. It actually installed python 3 samuel@samuel-pc:~$ python Python 3.5.2 |Anaconda 4.2.0 (64-bit)| (default, Jul 2 2016,...
Samuel M.'s user avatar
0 votes
1 answer
1k views

Setting "$PATH" environment for Unix "which" command

I am trying to run two chemistry programs together that need the PATH environment changed in order to find one another. The manual says: Under the UNIX operating systems, R.E.D. looks for the "...
DWK's user avatar
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0 votes
1 answer
503 views

issue with spaces in directory name for profile variable

I am trying to create a variable for a directory that has a space in its name in my profile. It looks something like: variable=/path/to/directory/with space/; export $variable I have tried many ...
Jdub87's user avatar
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3 votes
1 answer
2k views

Grass 7.2.1 error in Ubuntu 17.04 "failed to connect to session manager"

I recently installed Ubuntu 17.04 Desktop and GRASS GIS. While opening GRASS GIS I get this error: Debug: failed to connect to session manager: SESSION_MANAGER environment variable not defined? Any ...
Ahmadshah Afghan's user avatar
10 votes
3 answers
5k views

Where is this environment variable set?

Whenever I open a terminal I have this variable set: $ echo $http_proxy http://127.0.0.1:8888/ Where is this variable being set? I've checked .bashrc, .bash_profile, /etc/bash.bashrc and /etc/...
klarki's user avatar
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0 votes
3 answers
911 views

How do I extract the value a script assigns to an environment variable, from outside the script?

I have two .sh files (say test1.sh and test2.sh). test1.sh contains: export OMP_NUM_THREADS=8 test2.sh contains: export OMP_NUM_THREADS=4 Both files contain many other shell commands as well. ...
Arp's user avatar
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4 votes
1 answer
3k views

What're the differences between "display", "display-device", "monitor", "screen" in /etc/X11/xorg.conf and the $DISPLAY environment variable?

In the xorg.conf file there are _ Section "Screen" _ Section "Monitor" _ Option "UseDisplayDevice" (inside the screen section) plus the $DISPLAY environment variable. Which one of those 4 (screen,...
Nhu Thai Sanh Nguyen's user avatar
3 votes
1 answer
2k views

Which of these Paths should I use as the value of JAVA_HOME?

I am running Ubuntu 16.04. I have downloaded JDK 7.0 from Oracle website and untar'ed and put it in a folder /opt/JDK/, such that the final install directory is /opt/JDK/jdk1.7.0_80 Then I executed ...
Shy's user avatar
  • 235
0 votes
1 answer
5k views

/etc/environment changes reload immediatly in Ubuntu 16.04 but not in 14.04

I noticed that changing the content of /etc/environment in Ubuntu 16.04.1 immediately updates the output of env while doing this in Ubuntu 14.04.4 doesn't update the output of env (which requires you ...
Sicco's user avatar
  • 411
1 vote
2 answers
367 views

Automatically send file input to command using expanded variables

I need to send some credentials defined in a file to a vpn connection command which is waiting for username and password to be entered when executed. There is a similar requirement to my question ...
user35934's user avatar
  • 113
8 votes
2 answers
4k views

Run a Command-line Program with an Environment Variable

I am using the mpv media player to play my videos. I have a laptop with hybrid graphics so in order to use the discrete GPU I must use DRI_PRIME=1 mpv video.mp4 whenever I want to run mpv with the ...
JCCS's user avatar
  • 255
0 votes
1 answer
4k views

sumo simulator is showing "SUMO_HOME variable not set" and "unable to connect"

my@my-HP-15-Notebook-PC:~$ cd iitk/ my@my-HP-15-Notebook-PC:~/iitk$ netconvert --osm-files iitk.osm -o iitk.net.xml Warning: Environment variable SUMO_HOME is not set, using built in type maps. ...
Kialok's user avatar
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0 votes
1 answer
2k views

Why is running localedef not creating my new locale in /etc/locale.gen?

I am trying to create a new system locale. I have studied the directions at Unix Stackexchange and at Ask Ubuntu but my attempts to get my environment variable into /etc/locale.gen have been ...
G.W.'s user avatar
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1 vote
1 answer
74 views

Understanding the export command: Becomes the variable in already started child processes?

I still struggle with understanding the export command. I know that it is for making variables, which are defined in a console or script, available to child processes of the console / script. But ...
mizech's user avatar
  • 1,259
0 votes
1 answer
573 views

ssh login to server pops the error " Bad : modifier in $ (/) "

I am trying to login to my remote machine (Fedora machine) from my local machine (Ubuntu 14.04). I receive a typical error which seems related to setting of environment variables in my remote ...
user2634354's user avatar
4 votes
1 answer
17k views

exporting environment variable using .sh file

so I have create setup.sh file like this : #!/bin/bash export SP_TWITTER_KEY=adsfad export SP_TWITTER_SECRET=aadsfadsf export SP_TWITTER_ACCESSTOKEN=asdfasdfa export SP_TWITTER_ACCESSSECRET=...
Gujarat Santana's user avatar
10 votes
3 answers
22k views

How to get the value of an exported variable in the console

If I wrote export COMP_WORDS="this words" I need something like get-exported COMP_WORDS expecting something like COMP_WORDS="this words" I tried set | grep COMP_WORDS but it takes others lines
Emilio Platzer's user avatar
2 votes
1 answer
14k views

Get anaconda root directory

l'm looking to get my anaconda root directory. so l run : which anaconda3 l got /root/anaconda3/bin/anaconda Is that my anaconda root directory ?
vincent 's user avatar

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