Question

LINUX ubuntu please. Please show the result's screenshot. Thanks in advanced.

Using the regular expression rules create grep commands that locate the following lines in /etc/services:

All lines that contain the string smtp.

All lines that begin with the string smtp.

All lines that include periods (dots, .)

All lines that include the string ftp except when that string is followed immediately by a dash (-).

All lines in which the letter a follows the letter z.

All lines that include the string https or http-, but not those that include http followed by any other character.

All lines that end with a hash mark (#)

Answer 1

sh-4.4$ grep -i 'smtp' /home/cg/root/abc/* abc smtp xyz smtp started with sh-4.4$ grep -w smtp' /home/cg/root/abc/* smtp started with sh-4.4$ grep F /home/cg/root/abc/* periods., fuzz sh-4.4$ grep -v 'ftp-' /home/cg/root/abc/* I grep 'ftp" this is soimple ftp sh-4.4$ grep 'az' /home/cg/root/abc/* a is following the z az za 1 az sh-4.4$ grep 'https\ http-/home/cg/root/abc/* https only http- not only sh-4.4$ grep -E "#" /home/cg/root/abc/t ending with # test another # sh-4.4$

grep -i 'smtp' *
grep -w '^smtp' *
grep -F '.' *
grep -v 'ftp-' * | grep 'ftp'
grep 'az' *
grep 'https\|http-' *
grep -E '#' *

let me know if this is as expected