One liner linux

Linux -  makes life easy.. lets inspired with Linux

To see a line from big file.

         sed -n 'Xp' theFile, where X is your line number.

e.g          sed -n '42401p' /tmp/bd/soted_voter2.csv

To get more lines.

sed -n  '1127062,+10p' /tmp/gujrat/dhana_gujrat5

To remove a line from big file

sed -i '42401d' /tmp/bd/soted_voter2.csv

Note- If you dont put -i it will show whole output after replacement.

To get Non ascii/foreign characters of a file in red color.

grep --color='auto' -P -n "[\x80-\xFF]" /tmp/bd/soted_voter2.csv

To remove non-ascii chars from a file

tr -cd '\11\12\15\40-\176'  < /tmp/vr_votersorted2.copy > /tmp/bd/cleansortedvoter.copy

To grep pattern wise.

LANG=c;grep INSERT postgresql.log |grep 'Mar  10'|grep -P 'duration: \d\d\d' | cut -d' ' -f4 | cut -d':' -f1,2 | sort | uniq -c

To load data into cdb (only tab supported. )

cdbmake-12 jh jh.tmp < /tmp/jhepic1

To append some text at the end of line in a file.  

awk -F '`' '{print $1 "~2"}' epicmeta_stripped.csv > /tmp/jhepic

To move 1st 15 files from one dir to another.

find . maxdepth 1 -name '*voice*' | head -n 20 | xargs mv -t /tmp/p5

time perl -pi -e 's/0000-00-00 00:00:00//;' *2014*

To configure ip

ifconfig eth0 192.168.19.200/16 up

To Add gateway via command.

`route add default gw 192.168.2.234

To check which process is eating memory. 
ps -e -o pid,vsz,comm= | sort -n -k 2