nixCraft

hi am a newbie on Linux.. we're testing a centos5.3 server edition here.. i saw a syntax on net to use [su -c yum ....]
my question is... what does "-c" means..
hope for your patience if i seem to be so dumb.. as i ve said.. am a newbie.. thank you.

Using "-c" option with "su" you can pass a single COMMAND to the shell.

You can use --command=COMMAND as well.

pass single command to shell??? d'u mean only one command at a time.. ???
on a centos5.3 server, within the user X , i tried
yum update > u need to be root to perform this command
sudo 'yum update' > prompted a password.
root password -not valid.
with X password- X is not in the sudoers file......
su - root 'yum update' > -bash: yum update: no such file or directory
su -c 'yum update' - it worked

can u explain the result of each command i tried? again thank you for the patience..

Yes,
to use SUDO you have to configure it for user X,

here what you doing is running 'yum update' command as super user use of su -C,

instead of that you can simply login to root(super user) by using "su" and run "yum update"

ex:

#su
password :

#yum update

nice one..

................ youll be reading more next time...

i still have to reformat and reinstall centos in order for me to learn the "partitioning part" then configure it.. what packages to install and update...

it would be helpful for me if ul suggest a nice site to read...

hope for u 2 drop by and check on my posts every now and then..