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hpr0996 :: Command line cheat sheet

A Unix command cheat sheet written by FossWire

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Hosted by JWP on 2012-05-28 is flagged as Explicit and is released under a CC-BY-SA license.
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In today's show JWP tries calling in a live over the UK call in number UK: +44-203-432-5879 (The US number +1-206-203-5729) and tells us of a CC-BY-SA cheat sheet written by FossWire.

http://fosswire.com/post/2007/08/unixlinux-command-cheat-sheet/


date - print or set the system date and time
$ date
Wed Mar  7 19:53:05 CET 2012

cal, ncal — displays a calendar and the date of Easter
$ cal
cal: setlocale: No such file or directory
     March 2012       
Su Mo Tu We Th Fr Sa  
             1  2  3  
 4  5  6  7  8  9 10  
11 12 13 14 15 16 17  
18 19 20 21 22 23 24  
25 26 27 28 29 30 31  
                      
uptime - Tell how long the system has been running.

uname - print system information
$ uname -a
Linux video 3.1.0-1-amd64 #1 SMP Tue Nov 29 13:47:12 UTC 2011 x86_64 GNU/Linux

$ cat /proc/cpuinfo | head -5
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 44
model name      : AMD Sempron(tm) Processor 2600+

$ cat /proc/meminfo | head -5
MemTotal:        1027176 kB
MemFree:          111016 kB
Buffers:          136104 kB
Cached:           173992 kB
SwapCached:         7964 kB

du - estimate file space usage
$ du -ch | tail -1
253M    total

df - report file system disk space usage
$ df -h
Filesystem                   Size  Used Avail Use% Mounted on
/dev/sdd1                     28G   22G  4.3G  84% /
tmpfs                        5.0M  4.0K  5.0M   1% /lib/init/rw
tmpfs                        101M  632K  100M   1% /run
udev                         496M     0  496M   0% /dev
tmpfs                        201M     0  201M   0% /run/shm

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