Question

For each command give me the ENTIRE COMMAND SEQUENCE. If I ask you 'What command would I use to move the file one.txt to the parent directory and rename it to two.txt?", the answer is NOT 'mv'. That is only part of the command.

16. What command could I run to determine whether the ssh daemon is listening? With OpenSSH installed and running, the result should show that ssh/port 22 as "listening.' (5 pts)


17. Create a crontab entry that would run the file /etc/clear.sh at 5:55PM on the 2nd day of every month.


18. Create a crontab entry that would run the file /etc/clear.sh every day at 3PM.


19. Create a crontab entry that would run the file /etc/clear.sh every Wednesday at 5:01AM.


20.  Create a command that will find all files under / that end in the extension *.doc, and whose contents contain either the word "new" or "old" or "borrowed" or "blue". (5 pts).

Answer 1

16)
command= >  netstat -tulpn | grep ssh

root@ayushv: ~ root aayushv: # netstat -tulpn | grep ssh tcp tcp6 root ayushv: #1 1147/sshd 1147/sshod θ θ.0.0.0:22 θ :::22 LISTEN LISTEN



17)

5:55PM on the 2nd day of every month

command => 55 5 2 * *

18)

every day at 3PM

command => 0 15 * * * /etc/clear.sh

19)

very Wednesday at 5:01AM.

command =>1 5 * * WED? /etc/clear.sh

20)

files under / that end in the extension *.doc, and whose contents contain either the word "new" or "old" or "borrowed" or "blue". 

command =>

find . -type f \( -name *.doc \) -exec grep "new\|old\|borrowed\|blue" /dev/null {} \;