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Q.1992	Software::OS::Unix::Linux::Ubuntu:: How to install virtual box guest additions on Ubuntu 20.04.
Q.38	Software::OS::Unix::Linux::Where are the Linux telnet/login access control files.
Q.31	Software::OS::Unix::Linux::Where are the initialisation rc files.
Q.32	Software::OS::Unix::Linux::Where are the man source files.
Q.1945	Software::OS::Unix::Linux::abrt:: How to clean up files under /var/spool/abrt directory.
Q.1927	Software::OS::Unix::Linux::applications::mutt:: How to connect to the user mailbox using imap or pop3 protocol.
Q.1596	Software::OS::Unix::Linux::commands::chpasswd:: How to change user password non interactively using chpasswd.
Q.1620	Software::OS::Unix::Linux::commands::ethtool:: How to use ethtool to query or configure Network Interface settings such as speed and duplex.
Q.1463	Software::OS::Unix::Linux::commands::grep:: How to use grep tr and cut to extract the IP address only from ifconfig command.
Q.1571	Software::OS::Unix::Linux::commands::grep:: how to use grep to search for a keyword and display the filename, line number and the matching line text.
Q.1701	Software::OS::Unix::Linux::commands::lsof:: How to use lsof to identify process or processes accessing a file or filesystem.
Q.1849	Software::OS::Unix::Linux::commands::nc:: How to use nc as substitute for telnet to do connectivity test to remote IP and port.
Q.44	Software::OS::Unix::Linux::commands::sshpass:: What is sshpass and how to use it.
Q.2048	Software::OS::Unix::Linux::commands::su:: How is the use of su command controlled.
Q.1220	Software::OS::Unix::Linux::commands::sudo:: How to enable user1 to run su - without requiring password.
Q.1337	Software::OS::Unix::Linux::commands::sudo:: How to have allow multiple commands without password and also commands with parameters.
Q.1991	Software::OS::Unix::Linux::commands::sudo:: What is the syntax of sudoers polify file and how to troubleshoot sudo.
Q.1708	Software::OS::Unix::Linux::commands::vi:: How to turn on or turn off vim syntax highlighting with color fonts.
Q.487	Software::OS::Unix::Linux::dump:: How to use dump to perform image backup.
Q.1970	Software::OS::Unix::Linux::elinks:: How to invoke elinks pulldown menu and change the browser options.
Q.493	Software::OS::Unix::Linux::gawk:: How to use gawk.
Q.492	Software::OS::Unix::Linux::gawk:: How to use gawk to process output of another command.
Q.1895	Software::OS::Unix::Linux::iptables:: Cheatsheet and examples.
Q.1589	Software::OS::Unix::Linux::iptables:: How to disable iptables.
Q.1552	Software::OS::Unix::Linux::iptables:: How to manipulate iptables.
Q.1505	Software::OS::Unix::Linux::iptables:: Script to define basic iptables ruleset.
Q.1894	Software::OS::Unix::Linux::kernel:: How to prevent a kernel module from being loaded.
Q.130	Software::OS::Unix::Linux::mc:: How to connect to an ftp server from Midnight Commander (mc).
Q.494	Software::OS::Unix::Linux::mc:: Where is the Midnight Commander (mc) user config file.
Q.1665	Software::OS::Unix::Linux::rdesktop:: How use rdesktop to establish rdp session to windows machine.
Q.483	Software::OS::Unix::Linux::tar:: How to untar a tar file to a different directory.
Q.1973	Software::OS::Unix::Linux::tcpdump:: Examples of tcpdump command usage.
Q.2050	Software::OS::Unix::Linux::vim:: How to customise settings for vi(m).