Vi & Vim editor shortcut key

: shift +$ = End of the text file

:1 =starting of the text file

:10 = jump on line no. 10 directly

dd = delete a single line

12dd = delete a 12 line at a time

:wq = save a file

X (small x) = delete a single character

Dw = for delete a single word

O = add blank line below the cursor

Shift + O = add blank line above the cursor

Cc =change to line

Cw = used to change a single word

U = undo the chnges

Ctrl+r = redu the changes

Yy = for copy single line

P = for paste

Yw = for copy one word

4yy = 4 lines copy

GGYG = copy whole page or text

“ / ” = used to search file ,words & text name

N (capital N) = search to backward

n(small n) = search to forward direction

:set nu = set numbering to doc,file or text to all lines

:set nonu = remove to numbers from doc,file & text

:set hls = for hightling words

:set nohls = for remove hightling words

Shift+Tild sign ^ = use for uppercase character

:set ic = set ignore case highlited

:shift + H (capital H) = move head of the text

:shift +M (capital M ) = middle of the text

:shift+L (capital L)= End of the text

:shift X = to assign passwd

:set key = = to remove passwd

: %s/dhcpd/samba/g = used to replaced the word.

( where , s –substitute & g – for globle change )

: wq! = save file forcefully

Introduction about TAR files

Descriptions :- “ tar ” save many files together into a single tape pr disk archive.

Create a directory & folder & convert into tar,gz…etc

Mkdir big (folder)

Convert “big” folder into tar file.

Tar – cvf big.tar big

Tar – tvf big.tar ( t- stands for view the content of the file)

Tar – xvf big.tar (extract the tar file)

Compression Tools

gzip -v big.tar ( convert into tar.gz format)

gunzip -v big.tar.gz ( convert into tar file)

bzip2 –v big.tar ( convert into tar.bz2)

bunzip2 –v big.tar.bz2 (convert into big.tar)

tar –czvf big.tar.gz big ( use to gzip)

tar –tzvf big.tar.gz

tar –cjvf big.tar.bz2 big (used to bz2)

tar –cvf big.tar big big1 (add multiple files in tar)

Partition TableTopic

Partition table create using “fdisk -cu /dev/sda “ command

Fdisk –cu /dev/sda -----press enter key

Then ….use (m for help )

Press “ n “ for create a new partition

Press “ w” to write a partition table & save & exit

Then.. hit “ partx –a /dev/sda “ command ( to inform the kernel about new partition)

After that, format to a new partition table

Mkfs.ext4 /dev/sda5….

Then…create a mount he re ..

Mkdir /imp

Mount /dev/sda /imp (use for mount command)

Then make permanent entry in /etc/fstab , if mounting file not save in /etc/fstab then..at the time of rebooting system , mounted folder automatically umounted. So always make an entry in “fstab”.

/etc/fstb

/dev/sda5 /imp ext4 defaults 0 0 (entry like that).

Mount –a (to check mount error)

Blkid /dev/sda5 (showing uid)

Yum install gpm* -y (install mouse package)

Swap partition table

Fdisk –cu /dev/sda

n - create a new partition

press enter key & assign a size of swap partitions like,+1G

then , press enter

then.. press “ t” to change a partition code id (swap code = 82)

then press “w” to write a partition table , save & exit

now, inform to kernel by “ partx –a /dev/sda” command.

Now, format a partition table… mkfs.ext4 /dev/sda6… (to convert into swap partition table)

Swapon /dev/sda6 ( to command , see the swap partition active or not )

Swapon -s (to check active partition)

Swapoff /dev/sda6 (to use this command when we don’t have a more than one swap on.)

Now, permanent entry in “ /etc/fstab”

Vim /etc/fstab

/dev/sda6 swap swap defaults 0 0

Now check mount point with command “ mount -a ”