I use Centos $9.$ Lab $4\mathrm{.}1$

$1.$Describe two ways to show line $5$ from the $/$etc$/$passwd file.

$2.$How would you locate all text files on your server that contain the current IP address? Do you

need a regular expression to do this?

Y$3.$ou have just used the sed command that replaces all occurrences of the text Administrator

with root. Your Windows administrators do not like that very much. How do you revert?

$4.$ Assuming that in the ps aux command the fifth line contains information about memory

utilization, how would you process the output of that command to show the process that has the

heaviest memory utilization first in the results list?

$5.$ Which command enables you to filter the sixth column of ps aux output?

$6.$ How do you delete the sixth line from the file $//$myfile$?$Lab $2\mathrm{.}1$

Modify your shell environment so that on every subshell that is started, a variable is set. The

name of the variable should be COLOR, and the value should be set to red. Verify that it is

working.

Use the appropriate tools to find the command that you can use to change a user password. Do

you need root permissions to use this command?

From your home directory, type the command ls $-$al wergihl $*$ and ensure that errors as well as

regular output are redirected to a file with the name $/$tmp$/$lsoutput$.$I uses