Linux Split and Merge command

To split a large file into smaller ones:

Lets say you have to send your personal video file of size 100MB to your friend through Gmail but gmail has a maximum file upload limit of size 20MB.So you have to split it into 5 smaller files of size 20MB and upload it.For this you have to go to the directory where the file is stored and use the following command in the terminal:

$ split –b20m Largefilename Smallfilename

where 20m is the size of output file in MB,to split in KB put k instead of m.various other options are also available to split command,to know them just type

$ split --help

To join smaller files into a larger one:

These days most files hosted at major file hosting sites are split into smaller files such as *.001…009 or *.part01…*.part09 etc.To join these files you don’t have to search for any external softwares,you just have the commands built into every GNU/Linux system.

To join the part files open up the terminal and navigate to the directory where the files are placed and execute the command:

$ cat partfilename* > outputfilename

For example if the file names are

video.avi.01

video.avi.02

video.avi.03 etc.use

$ cat video.avi.* > video1.avi

Ref:

http://blulin.wordpress.com/2009/02/07/split-and-join-large-files-in-gnulinux-just-using-terminal/

Symbols using Keyboard

HOW TO MAKE SYMBOLS WITH KEYBOARD
Alt + 0153….. ™… trademark symbol
Alt + 0169…. ©…. copyright symbol
Alt + 0174….. ®….registered ­ trademark symbol
Alt + 0176 …°……degre ­e symbol
Alt + 0177 …±….plus-or ­-minus sign
Alt + 0182 …¶…..paragr ­aph mark
Alt + 0190 …¾….fractio ­n, three-fourths
Alt + 0215 ….×…..multi ­plication sign
Alt + 0162…¢….the ­ cent sign
Alt + 0161…..¡….. ­.upside down exclamation point
Alt + 0191…..¿….. ­upside down question mark
Alt + 1…….☺….sm ­iley face
Alt + 2 ……☻…..bla ­ck smiley face
Alt + 15…..☼…..su ­n
Alt + 12……♀…..f ­emale sign
Alt + 11…..♂……m ­ale sign
Alt + 6…….♠…..s ­pade
Alt + 5…….♣…… ­Club
Alt + 3…….♥…… ­Heart
Alt + 4…….♦…… ­Diamond
Alt + 13……♪…..e ­ighth note
Alt + 14……♫…… ­beamed eighth note
Alt + 8721…. ∑…. N-ary summation (auto sum)
Alt + 251…..√…..s ­quare root check mark
Alt + 8236…..∞….. ­infinity
Alt + 24…….↑….. ­up arrow
Alt + 25……↓…… ­down arrow
Alt + 26…..→…..ri ­ght arrow
Alt + 27……←…..l ­eft arrow
Alt + 18…..↕……u ­p/down arrow
Alt + 29……↔…lef ­t right arrow

Gallery

ubuntu 12.04 grub rescue

Ref: —– http://opensource-sidh.blogspot.in/2011/06/recover-grub-live-ubuntu-cd-pendrive.html http://rbgeek.wordpress.com/2012/06/29/how-to-reinstall-ubuntu-without-losing-the-old-data-with-separate-home-partition/ http://askubuntu.com/questions/83771/recovering-grub-after-installing-windows-7 http://askubuntu.com/questions/197833/recovering-from-grub-rescue-crash http://askubuntu.com/questions/159846/tried-to-boot-ubuntu-but-the-grub-rescue-shows-up-instead

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