please ..help me on variables

bruse · 04-16-2005, 06:43 AM

hello what is environment variables.

i have to set LAMRSH=ssh permanently..

so how to set this permanently in my system..

this is common for all users or only exist user only..

__J · 04-16-2005, 06:58 AM

depends on your shell, in bash or zsh:

export LAMRSH=ssh

will set the variable ( note that doing it on the command line last for that session only - as soon as you close the terminal or log out it is no longer in effect).

for a more permanent solution, you will have to enter it into either /home/<user>/.bashrc ( you may have to create this one, this one is for the current user only) or add the above line to /etc/profile ( for all users).

masand · 04-16-2005, 12:13 PM

hey __J

can we set the environment block variable with some C program

regards

__J · 04-16-2005, 05:01 PM

sorry, but I'm not sure I completely understand what you are asking? do you want to set an environmental variable from a c program ( just any variable) or set a certain variable from c?

masand · 04-16-2005, 10:30 PM

i want to define a new environment variable

btmiller · 04-16-2005, 11:50 PM

See man 3 setenv ... doing "apropos environment" would have helped you find this answer on your own.

masand · 04-17-2005, 12:08 AM

i have done that
but setenv will have to be run each time to be setup
ho can we permanently create an env. variable

regards

btmiller · 04-17-2005, 12:41 AM

I'm not sure what you mean ... if you're writing C code, just call setenv at the beginning of your program execution. If you need the environment variable set up in your shell at all times, then put it in your shell startup file (~/.bashrc and ~/.bash_profile if using bash).

masand · 04-17-2005, 12:57 AM

yes i have been doing that
setenv and outenv are used for changing the values of define env variables
can i use them to create new env variables??

i am on ubuntu and i do not have this utility here so i cannot check and tell u that right now....

regards