Visit Our UNIX and Linux User Community


what is the use of Environment variables


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers what is the use of Environment variables
# 1  
Old 07-24-2001
Data what is the use of Environment variables

what is the actual use of environment variables.
I know only PS1, LOGNAME, PS2 variables
what are the other variables & what is there use
# 2  
Old 07-24-2001
For a real general question like that i would have to point you to a booke store. such as barns & noble.

For example my "Learning the Korn Shell" book by O'reilly has a list of env variables and what not and explanes what each of them are.

it also helps you understand using the ksh envronment.
# 3  
Old 07-24-2001

Try typing:
env
Both my Linux systems at home, and the HP-UX boxes at work will give you a list of your set variables when you type that.
 

Previous Thread | Next Thread
Test Your Knowledge in Computers #599
Difficulty: Medium
For modern C programming, defining functions is a two step process. First, you declare a function and its signature using a prototype. Then you define the function by providing a function body that defines what the function does.
True or False?

10 More Discussions You Might Find Interesting

1. HP-UX

Environment Variables

Hi All, I need to understand following three environment variables and their usages in HP Unix. _M_ARENA_OPTS _M_CACHE_OPTS PTHREAD_SCOPE_SYSTEM How does these environment variables influence multi threaded applciation and how do we decide the value of these variables? Is there... (0 Replies)
Discussion started by: angshuman
0 Replies

2. Homework & Coursework Questions

Environment Variables

1. The problem statement: What is the mesg value set for your environment? If it is on, how would you turn off your current session? How would you set it permanently? 3. The attempts at a solution : Read Unix The textbook. 3rd chapter has many things like environment variables and... (5 Replies)
Discussion started by: mahinkhan22
5 Replies

3. HP-UX

Environment Variables

Hi Experts, Need your help in understanding the commands to setup the environment variables in hp-ux. Beleive need to use either set,setenv or export. I am confused between above three options, when to use which option? On command line, I have tried both set and setenv but couldn't... (1 Reply)
Discussion started by: sai_2507
1 Replies

4. Shell Programming and Scripting

Environment variables

I have read tons of posts about how you can't set persisting environment variable in a child script of a shell and have it persist. The only way is to source a file as % . <scriptname> I am finding that true... but I know there is a way around it. I just don't know how. I worked for 6... (5 Replies)
Discussion started by: rwa25
5 Replies

5. UNIX for Dummies Questions & Answers

Environment variables

why are all environment variables represented in a fixed format regardless of the shell you use? like $HOME $PATH etc (6 Replies)
Discussion started by: sravani
6 Replies

6. Shell Programming and Scripting

environment variables

Hi, If i have a variable set and exported in my pofile file will that variable be available in all shell scripts created. Thanks, Radhika. (3 Replies)
Discussion started by: radhika03
3 Replies

7. Programming

environment variables

hi, I want to create a new EV(Environment Variable) through a c program and I done this thing through setenv() method. But the newly created EV is not permanent, i.e. when I exit from the program the EV also no longer lives. But I want to make it a permanent EV for the current user. Actually I... (6 Replies)
Discussion started by: sumsin
6 Replies

8. UNIX for Dummies Questions & Answers

help..Environment variables...

hi, 1). i would like to know what is meant by environment variables? 2). is the number of envi variables is a constant number for unix systems? 3). how to see the list of envi variables (and the values of the envi variables)in a single command? 4). if this questions were already asked... (3 Replies)
Discussion started by: sekar sundaram
3 Replies

9. UNIX for Dummies Questions & Answers

environment variables

Hi Folks, Is it possible somehow to unset all the environment variables which have been defined before in UNIX (Solaris). Thanks, Slava (3 Replies)
Discussion started by: spavlov
3 Replies

10. Programming

environment variables

Hi! How-to get the environment variables in GNU. getenv() only fetches the ones that you can find under export (not the ones under declare)... best regars .David (2 Replies)
Discussion started by: Esaia
2 Replies

Featured Tech Videos