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<table cellpadding="5" width="80%"><tr valign="top"><th width="25%" style="border-bottom: 1px solid black;text-align:left;">Linux Command /<br>Key Combination</th><th style="border-bottom: 1px solid black;text-align:left;">Purpose</th></tr><tr valign="top"><td><span style="font-family:courier;font-weight:bold;">ps</span></td><td>The '''ps''' (''process status'') command displays snapshot information about processes. By default, the ps command displays information only about the current terminal ('''ps -l''' provides a detailed listing, '''ps -U''' username shows all)<br><br>''Examples: ''<span style="font-family:courier;font-weight:bold">ps , ps -l , ps -ef , ps -u , ps aux</span><br></td></tr><tr valign="top"><td>'''<span style="font-family:courier;font-weight:bold;">top</span>'''</td><td>The '''top''' command provides a realtime status of running processes.<br>'''NOTE:''' You can press '''ctrl-c''' to exit<br></td></tr><tr valign="top"><td><span style="font-family:courier;font-weight:bold;">fg</span></td><td>The '''fg''' (foreground) command moves a background job from the current environment into the foreground. The fg command issued without arguments will place the most recent process in the background to the '''foreground'''. ''Example: ''<span style="font-family:courier;font-weight:bold">fg %job-number</span></td></tr><tr valign="top"><td><span style="font-family:courier;">'''ctrl-c'''</span></td><td>'''Terminates''' a process running in the foreground</td></tr><tr valign="top"><td><span style="font-family:courier;">'''ctrl-z'''</span></td><td>Sends a process running in the foreground into the '''background'''.</td></tr><tr valign="top"><td><span style="font-family:courier;font-weight:bold;">bg</span></td><td>The '''bg''' utility '''resumes''' suspended jobs from the current environment. The bg command issued without arguments will run the most recent process that was placed into the background.<br>''Example: ''<span style="font-family:courier;font-weight:bold">bg %job-number</span></td></tr><tr valign="top"><td><span style="font-family:courier;font-weight:bold;">jobs</span></td><td>The '''jobs''' utility displays the '''status''' of jobs that were started in the current shell environment<br>''Examples:<br>''<span style="font-family:courier;">jobs<br>[1]+ Stopped vim a <span style="font-size:8pt;">&nbsp; &lt;-- Job #1 (+ most recent process / background)</span><br>[2]&nbsp; Running sleep 200 & <span style="font-size:8pt;">&nbsp;&lt;-- Job #2</span><br>[3] &nbsp;Running sleep 300 & <span style="font-size:8pt;">&nbsp;&lt;-- Job #3</span><br>[4]- Running sleep 400 &<span style="font-size:8pt;">&nbsp; &lt;-- Job #4 (- second recent process / background)</span><br><br></span></td></tr><tr valign="top"><td><span style="font-family:courier;font-weight:bold;">kill</span></td><td>The kill command sends the specified signal to the specified processes or process groups. If no signal is specified, the '''TERM''' signal is sent. The default action for this signal is to terminate the process.<br>''Examples:''<br><span style="font-family:courier;font-weight:bold;">kill PID , kill -9 PID , kill %job-number , <br>kill -9 %job-number</span></td></tr></table>