Clarification of 'sed' usage -

Clarification of 'sed' usage -

i blindly followed command tutorial rename several folders @ time. can explain meaning of "p;s" given argument sed's -e option.

[root@linuxd delsure]# ls ar1 ar2 ar3 ar4 ar5 ar6 ar7 [root@linuxd delsure]# find . -type d -name "ar*"|sed -e "p;s/ar/ar/g"|xargs -n2 mv [root@linuxd delsure]# ls ar1 ar2 ar3 ar4 ar5 ar6 ar7

a sed script (the bit next -e option) can contain multiple commands, separated ;

the script in illustration uses p command print pattern space (i.e. line read input) followed s command perform substitution on pattern space.

by default (unless pattern space cleared or -n alternative given sed) after processing each line current pattern spaceline printed again, result of substitution printed.

another way write same thing be:

sed -e "p" -e "s/ar/ar/g"

this separates commands 2 scripts. way be:

sed "p;s/ar/ar/g"

because if argument sed script -e alternative not needed

sed