Linux Shell Script Essentials for DevOps | AWK | Regular Expressions | Boot Process | cksum Tutoria

Linux Shell Script Essentials for DevOps | AWK | Regular Expressions | Boot Process | cksum Tutorial

#linuxtutorials #linuxandshelltutorials

Why case statement is used
Why sed is used
how do we define a function
how do we call a function
how do we delete a file using sed
AWK Command - extract the rows or column from output
Regular Experessions
---------------------
* - match 0 or more occurances
^ -carrot / begining of line
$ - ending
? - single charecter

Boot Process
---------------
post
bios
mbr - master boot record
boot loader
kernal
/etc/inittab

who -r -- run level

fsck -- file system check

cd /a
tar -cvf sample.tar -- will compress all files
zip/gzip -- reduce the size of file
gzip -9 sample.tar -- sample.tar.gz

scp -- another machine

sample.tar.gz

gunzip sample.tar.gz -- sample.tar

tar -- xvf sample.tar -- all 1000 files

cksum -- to check the checksum

cksum filename -- first name

cksum filename --
---------------
/etc/

df -h -- /xyz

installation of a package
unix
linux

var = 'uname -na | cut -f1 -d" " '

if [ $ var == Linux]
then
----
else
------
fi


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