Linux Command
 

what is the meaning of these command and when can i use them??
rpm -i
rpm -ivh
apt-get update
apt- get upgrade
atp-cach

rpm is the RedHat Package Manager - you would use it in an rpm based distro such as Red Hat, Fedora or Mandrake. The -i, -v and -h (or -ivh) means:
-i = install
-v = verbose (tells you what's going on)
-h = hashes (a progress bar while it installs)
see also -e (uninstall)

The apt-get commands are for Debian based distros, such as Debian (of course) and Knoppix.

Which are you running?

i use Redhat 8,x

Here is lots of info on those/

# Red Hat & Fedora links
FedoraNEWS.ORG
Did you download? See: Installing from a Hard Drive
Red Hat 9 Rescue Mode
Red Hat 8 Rescue Mode
The Fedora HOWTO explains the different software managers.
Red Hat Linux Manuals
Get your mp3 support here
Maximum RPM
rpmfind
Easier software management: apt4rpm - Red Carpet
Red Hat 8.0 Tips & Tricks
# Red Hat 7.3 down configuration commands
setup leads to several configuration tools
# Red Hat 7.3 up configuration commands
Configure soundcard:
redhat-config-soundcard
Configure X server:
redhat-config-xfree86
Configure network:
redhat-config-network
Manage software:
redhat-config-packages
Red Hat Linux 8.0 Package Management Tool
Red Hat 9.0 Package Management Tool
Manage users
redhat-config-users
# Handling NTFS
New Technology FileSystem (NTFS) HOWTOs
Linux NTFS project