We are different administrators to administrate Linux servers(Fedora Core and RHEL). Sometimes we use remote access ssh and su to perform important tasks and read logs. Since we use the same admin username and password, it is sometimes difficult to know who has done what and when. Is it possible to log tasks and use different accounts with admin privileges on linux? I would also like to write a script which will echo a warning message when commands like rm is used and eventually prevent irrecoverable actions on important system folders like /bin /sbin /etc /boot and /home. Thanks for help and any referred web link.