commands using grep or sed utility

write grep command for display lines of file F1 that begins with “The”

grep ‘^The’ F1

count total number of blank lines of file F1

grep -c ‘^$’ F1

display the lines of file F1 that do not contain “Unix”

grep -v ‘Unix’ F1

replace all occurrences of ‘unix’ with ‘linux’ of file F1

sed ‘s/unix/linux/g’ F1

sed -i ‘s/unix/linux/g’ F1

replace all occurrences of ‘unix’ with ‘linux’ of file F1

sed ‘s/unix/linux/g’ F1

display the lines of file F1 that contain “VB.net” and / or “Asp.net”

grep -E ‘VB\.net|Asp\.net’ F1

grep -e ‘VB\.net’ -e ‘Asp\.net’ F1

display lines of file F1 which have exactly 4-characters.

grep -x ‘.\{4\}’ F1

do not display line number 3 to 5 of file F1

sed ‘3,5d’ F1

insert blank line after each line of the file F1

sed ‘G’ F1