Question { HP, 13354 }

Write a cron entry for the following scenario:-
At 10:30 AM for every Sunday of every 1st month of a
quarter.

Answer

* * * * * command to be executed
- - - - -
| | | | |
| | | | ----- Day of week (0 - 7) (Sunday=0 or 7)
| | | ------- Month (1 - 12)
| | --------- Day of month (1 - 31)
| ----------- Hour (0 - 23)
------------- Minute (0 - 59)

crontab -e for entry.

30 10 * 1,4,7,10 7

Question { Span Systems, 8435 }

I have a user name in /etc/vsftpd/user_list which is for
blocking the ftp user. Now i blocked the user as well ,but
without removing username in user_list i wanna access the
users home directory and his own directory .How will you
access the data ????

Answer

may be enter at hosts.deney file. then restricted perticular user. vi /etc/hosts.deney

Question { Polaris, 12665 }

How to replace the exact word in vi editor??
suppose a file contains words like amaze,amazed,amazement in
some of the line.But i want to replace only 'amaze' with
delight but don't wanna replace amazed or amazement.
thanks

Answer

First open the file by using vi editor and then

use this :%s /amaze/delight/g