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The grep switches eliminate the need for awk and sed. Modifying vim with -p will show all files in separate tabs, -o in separate vim windows. Just wish it didn't hose my terminal once I exit vim!!
This will drop you into vim to edit all files that contain your grep string.
Next time you see a mac fanboy bragging about 64-bitness of 10.6 give him this so he might sh?
biggest->small directories, then biggest->smallest files
Show time and date when you installed your OS.
missed the last char thanks @Josay
Can change language and speed, see espeak man page for options. (Install espeak in your linux distro via yum or apt-get)
For insomniacs you may need to enclose in a while true; do ...; done loop ;)
use manpages, they give you "ultimate commands"
"ls -SshF --color" list by filesize (biggest at the top)
"ls -SshFr --color" list by filesize in reverse order (biggest at the bottom)
adding users to groups on OS X is not a straightforward process, you need to use the new in built in Directory Service command line utility...
Sorts a character string, using common shell commands.
using bc is for sissies. dc is much better :-D
Polish notation will rule the world...
For Mac OS X users only
This command uses nmap to perform reverse DNS lookups on a subnet. It produces a list of IP addresses with the corresponding PTR record for a given subnet. You can enter the subnet in CDIR notation (i.e. /24 for a Class C)). You could add "--dns-servers x.x.x.x" after the "-sL" if you need the lookups to be performed on a specific DNS server.
On some installations nmap needs sudo I believe. Also I hope awk is standard on most distros.
-l auto-selects many more digits (but you can round/truncate in your head, right) plus it loads a few math functions like sin().
Only one command and not dependant on full read access to the devices.
Show today date on a yearly calendar.
simple way to show free swap
see about php install configure