$11.$ execute the following: ps $$ef $|$ more

The $|$ is a pipe symbol which pipes the first command into the second command.

$12.$ Execute the following:

a$.$ cd ~

b$.$ touch test

c$.$ ls $$al $($What did $$touch$$ do$?$ run manpage on it and explain: man touch$)$

$13.$ cp test test$2($This should copy test to test$2)$

$14.$ cat $/$etc$/$services $>$ myservices $($What does cat do$?)$

cat myservices

$15.$ diff $/$etc$/$services myservices $($This should print no output as they are the same$)$

a$.$ diff $/$etc$/$services $/$home$/$userid$/$myservices $($Where userid is your userid$)$

b$.$ diff $/$etc$/$services ~$/$myservices

$16.$ cd $/$usr

a$.$ pwd $($What directory are you in$?)$

b$.$ cd ~

c$.$ pwd $($And now?$)$

$17.$ execute the following:

a$.$ cd ~

b$.$ cat $/$etc$/$hosts $>$ difffile

c$.$ cat $/$etc$/$resolv$.$conf $>>$ difffile

d$.$ cat difffile

e$.$ diff $/$etc$/$hosts difffile

f$.$ diff $/$etc$/$resolv$.$conf difffile

$18.$ cp $/$etc$/$hosts difffile $($Should overwrite difffile$)$

$19.$ grep http $/$etc$/$services

a$.$ grep http myservices $($Remember we did a cat and replicate the file in our home dir$)$

b$.$ grep http $/$etc$/$serv$*($we could use $*$ as a wildcard$)$

$20.$ echo $$This was a fun assignment$$