ubuntu-survival-guide.html

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					<div id="logo"> </div>
					<div>
					<h1>Ubuntu</h1>
					<h3 style="color: gold;">A Survival Guide</h3>
					<span style="color: silver" >squeezed into a cheat sheet</span>
					</div>
				</div><div style="width: 50%;">
					<h4 style="color: crimson;">&#x1f4aa; Super Powers</h4>
					<div style="width: 100%;">
					<div  style="width: 35%;">
					<p>
						Run a command as Super User<br>
						<code>sudo COMMAND</code>
					</p>
					</div><div  style="width: 25%;" >
					<p>
						Elevate to <em>root</em><br>
						<code>sudo -i</code>
					</p>
					</div><div  style="width: 40%;">
					<p>
						Turn a user into a Super User<br>
						<code>sudo usermod -aG sudo USER</code>
					</p>
					</div>

					</div>
				</div>
			</section><section id="left">
				<h4 style="color: dodgerBlue;">&#x1F527; System Maintenance</h4>
				<p>
					Show Kernel version (<code>-a</code> for all)<br>
					<code>uname -r</code>
				</p>
				<p>
					Show Ubuntu version (<code>-a</code> for all)<br>
					<code>lsb_release -r</code>
				</p>
				<p>
					Keep the system up-to-date<br>
					<code>sudo apt update && sudo apt dist-upgrade</code>
				</p>
				<p>
					Keep the system clean (by deleting useless files)<br>
					<code>sudo apt autoremove && sudo apt autoclean</code>
				</p>
				<p>
					Upgrade to a newer release (system must be up-to-date first)<br>
					<code>sudo do-release-upgrade -d</code>
				</p>
				<p>
					List all running processes<br>
					<code>ps aux</code>
				</p>
				<p>
					Kill a process<br>
					<code>kill -9 PROCESS_ID</code>
				</p>
				<p>
					See which programs are listening on which ports<br>
					<code>netstat -peanut</code>
				</p>
				<p>
					See who is listening on a specific port<br>
					<code>lsof -i :PORT</code>
				</p>
				<p>
					Run a command as a service (console won't hang)<br>
					<code>COMMAND &</code>
				</p>
				<p>
					Find a previous command in the <em>History</em><br>
					<code>history | grep COMMAND</code>
				</p>
				<p>
					Run a previous command found in the <em>History</em><br>
					<code>!COMMAND_ID</code>
				</p>
				<p>
					Check out System Logs (other logs are in the same folder)<br>
					<code>cat /var/log/syslog</code> (or <code>less</code> or <code>tail</code> or <code>nano</code> or...)
				</p>
			</section><section id="middle">
				<h4 style="color: forestGreen;">&#x1F4C1; Files and Folders</h4>
				<p>
					List files with details<br>
					<code>ls -l</code>
				</p>
				<p>
					List all files including hidden files<br>
					<code>ls -la</code>
				</p>
				<p>
					List files ordered by last modified<br>
					<code>ls -lt</code>
				</p>
				<p>
					Clone a directory (recursive, same timestamps and permissions)<br>
					<code>cp -a FOLDER TARGET</code>
				</p>
				<p>
					Find a file from current directory<br>
					<code>sudo find . -name 'FILE'</code>
				</p>
				<p>
					Read the last 1000 rows of a file and listen for modifications<br>
					<code>tail -1000f FILE</code>
				</p>
				<p>
					Read a file interactively (h for help)<br>
					<code>less FILE</code>
				</p>
				<p>
					Get the size of a directory<br>
					<code>du -sh FOLDER</code>
				</p>
				<p>
					Check partitions status (is your disk full?)<br>
					<code>df -h</code>
				</p>
				<p>
					Relax permissions on a file or a folder:<br>
					<code>chmod 777 TARGET</code>
				</p>
				<p>
					Set ownership (user/group) of a file or a folder<br>
					<code>chown USER:GROUP TARGET</code>
				</p>
				<p>
					Open a file in a privileged terminal editor<br>
					<code>sudo nano FILE</code>
				</p>
				<p>
					Find occurrences of a text in a file or in many files<br>
					<code>grep TEXT TARGET</code>
				</p>
			</section><section id="right">
				<h4 style="color: orange;">&#x1F465; Users and Groups</h4>
				<p>
					List all groups<br>
					<code>groups</code>
				</p>
				<p>
					List groups a user is a member of<br>
					<code>groups USER</code>
				</p>
				<p>
					List users which are members of a group<br>
					<code>getent group GROUP</code>
				</p>
				<p>
					Create a new user<br>
					<code>sudo adduser USER</code>
				</p>
				<p>
					Add an existing user to a group<br>
					<code>sudo usermod -aG GROUP USER</code>
				</p>
				<p>
					Change a user's password<br>
					<code>passwd USER</code>
				</p>
				<p>
					Impersonate a user (or return to your user from root)<br>
					<code>su USER</code>
				</p>
				<p>
					Move to user home (AKA <code>~</code>, AKA <code>/home/USER</code>)<br>
					<code>cd</code>
				</p>
				<p>
					Delete a user<br>
					<code>sudo userdel USER</code>
				</p>

				<h4 style="color: coral;">&#x1F3A8;&#xA; Graphical User Interface</h4>
				<p>
					Open a Terminal<br>
					<code>CTRL + ALT + T</code>
				</p>
				<p>
					Open a privileged file explorer (for current folder use <code>.</code>)<br>
					<code>sudo nautilus PATH</code>
				</p>
				<p>
					Open a file in a privileged GUI text editor<br>
					<code>sudo gedit FILE</code>
				</p>
			</section><section id="bottom">
				<div style="width:33%; text-align: left;">
					Made with &#x2764; by Andrea Ligios
				</div><div style="width:33%;">
					&#x1F5FD; MIT License
				</div><div style="width:33%; text-align: right;">
					&#x2B50; https://andrea-ligios.github.io/ubuntu-survival-guide/
				</div>
			</section>
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