Changes

<table cellpadding="5"><tr><th style="border-bottom: 1px solid black;text-align:left;">Linux Command</th><th style="border-bottom: 1px solid black;text-align:left;">Purpose</th></tr><tr valign="top"><td>'''ps'''</td><td>x</td></<tr><tr valign="top"><td>'''top'''</td><td>x</td></tr><tr><td>'''[! ]fg'''</td><td>Square brackets containing an exclamation mark immediately afterx<br/td></tr><tr valign="top"><td>'''bg'''</td><td>the open square bracket ([! ]) to represent and match andx<br/td></tr><tr valign="top">'''jobs'''</td><td>x</td></tr><tr><td>'''OPPOSITEkill''' character for the character enclosed within the square brackets.</td></tr></table>