After a minor security incident you are instructed by your lead sys-admin to verify the RPM's installed on running system. Which command will create a complete report which you can analyze for changes which may be security related?
You have read/write permission on an ordinary file foo. You have just run ln foo bar. What would happen if you ran rm foo?
Which chown command will change the ownership to foo and the group to bar on a file named biglist?
In Bash, inserting "1>&2" after a command redirects