`sed`, `grep`, `awk`

[keidarcy]

• sed
• grep
• awk

[keidarcy]

grep -n -i 'root' /tmp/test_grep.txt --color=auto 

[keidarcy]

sed "2,+3p" test.txt -n

sed "/with/p" test.txt -n

sed '2,$d' test.txt

sed -E -e "s/(Y|y)ou/Me/" test.txt -e "s/may/might/g"

sed "2i hello" test.txt -i

sed "2a hello" test.txt -i

sed "a -------------------------------" test.txt

ifconfig lo0 | sed "2p" -n | sed -e "s/^.*=//" -e "s/<.*//g"

[keidarcy]

awk '{print $1}' test.txt

awk '{print $1,$2,$3}' test.txt

awk '{print "Hello: "$1,"World: "$2}' test.txt

awk 'NR==2,NR==3{print $1}' test.txt

awk '{print NR,$1}' test.txt

awk '{print $1, $(NF-1)}' test.txt

[keidarcy]

echo $PATH | awk -F ":" '{print $1,$NF}'

echo $PATH | awk -v FS=":" '{print $1}'

echo $PATH | awk -v FS=":" '{print $1,"--------------",$2}'

echo $PATH | awk -v FS=":" -v OFS="\n" '{print $1,$2}'

[keidarcy]

awk 'BEGIN{print "something here"}{print $1}' test.txt

awk 'BEGIN{print "-----------something before start-----------"}{print $1}END{print "--------------something after end--------------"}' test.txt

awk 'NR<4{print $0}' test.txt

awk 'NR<4{print $0}' test.txt

awk '/\/usr\/bin\/false$/{print NR,$0}' test.txt

awk '/^_game/,/^_dist/{print $0}' test.txt