Where to find the environmental variables file in CentOS

Question

Where can I find the envvars configuration file (if there are any) in CentOS?

I know in Ubuntu, Apache2, I can find it from /etc/apache2/envvars

I've tried the command,

export EXAMPLE=value command. Does it require server restart to get it affected?

Please advise, thanks in advance :)

score 4 · Accepted Answer · answered Jan 19 '16 at 11:51

4

Global Environment variable file is :- /etc/profile

Local Environment Variable ( User Specific ) file is :- ~/.bash_profile

answered Jan 19 '16 at 11:51

Siddharth sharma

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There are some existing environmental variables, which I get using PHP `getenv()` function. I would like to know where this is saved in. – Vaishak Jan 19 '16 at 11:55
you can use `set` command and this will list all the env variables in your current session. – Siddharth sharma Jan 19 '16 at 11:59
I'm able to add this through WHM, but need to know where does it get saved. – Vaishak Jan 19 '16 at 12:06
through getenv() function you get the value of environment variable that are already stored. – Siddharth sharma Jan 19 '16 at 12:15
Agree, would like to know where does these environmental variables get stored? Like in Apache2 `/etc/apache2/envvars`. – Vaishak Jan 19 '16 at 12:23
I gave you answer. In /etc/profile – Siddharth sharma Jan 19 '16 at 12:26
Thanks, I was able to add the env var through WHM, but curious to know where its getting saved. The ones added from WHM is not getting saved in /etc/profile. Any idea? – Vaishak Jan 20 '16 at 04:09
Check /etc/httpd/sysconfig file for that. Apache Env variables are stored there. – Siddharth sharma Jan 20 '16 at 04:52
`/etc/httpd/sysconfig` It doesn't exist!! – Vaishak Jan 20 '16 at 05:13
My bad.. It is `/etc/sysconfig/httpd` – Siddharth sharma Jan 20 '16 at 05:15
Don't know whats happening, the file `/etc/sysconfig/httpd` doesn't exist too!! – Vaishak Jan 20 '16 at 05:20
you have apache installed .. (htttpd) If yes than it must be there – Siddharth sharma Jan 20 '16 at 05:21
These are only environment variable files in CentOS. `/etc/profile`,`/etc/profile.d/`,`~/.bash_profile` and `/etc/sysconfig/httpd`. And some commands like `env` and `set` used to view env variables. If you don't find your variables in these than it might be possible they exists at runtime. The kernel stores the list of environment variables and their values for each process. A virtual file exists at `/proc//environ ` – Siddharth sharma Jan 20 '16 at 05:28
I'm not sure. I'm new to Linux, it was done by someone else and I'm figuring it out. Thanks :) – Vaishak Jan 20 '16 at 06:48

score 1 · Answer 2 · edited Apr 13 '17 at 12:14

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Rehdat Equiv to /etc/apache2/envvars

The Redhat and Centos equiv to /etc/apache2/envvars is /etc/sysconfig/httpd

The other answers are also correct if you are ok with the variables being truly global. Using /etc/sysconfig/httpd will keep the variables confined to httpd.

As Siddharth sharma pointed out, you can also set the environment variable in the apache config.

e.g.

SetEnv TMPDIR /var/www/.cgitmp

edited Apr 13 '17 at 12:14

Community

1

answered Jan 19 '16 at 15:05

Aaron

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The file `/etc/sysconfig/httpd` doesn't exist!! – Vaishak Jan 20 '16 at 05:21
How did you install apache? If you used `yum install httpd` then you most certainly would have that file. – Aaron Jan 20 '16 at 06:38
I'm not sure. I'm new to Linux, it was done by someone else and I'm figuring it out. Thanks :) – Vaishak Jan 20 '16 at 06:48
If someone removed the file by mistake, you can put it back. By default, it just contains `LANG=C` and a commented out `#OPTIONS=` – Aaron Jan 20 '16 at 06:50
As @Siddharth sharma said, _If you don't find your variables in these than it might be possible they exists at runtime. The kernel stores the list of environment variables and their values for each process_. I was able to find the environ files under different process. How can I find out whether the apache runs on httpd or litespeed? I could see both processes running. Confused. – Vaishak Jan 20 '16 at 07:43

score 0 · Answer 3 · answered Jan 19 '16 at 11:55

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Just run set and you will see all env variables of your session.
export acts immideately, you don't need any extra actions.

answered Jan 19 '16 at 11:55

user1700494

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Where to find the environmental variables file in CentOS

3 Answers3