A.Ctrl XX

B.Esc ZZ

C.Esc :wq

D.Ctrl :W

E.Esc zz

A.grep -E ':08:[09]+:[09]+' loga.log

B.grep -E ':08:[00]+' loga.log

C.grep -E loga.log ':08:[0-9]+:[0-9]+'

D.grep loga.log ':08:[0-9]:[0-9]'

E.grep -E ':08:[0-9]+:[0-9]+' loga.log

A.full-upgrade

B.

C.update

D.dist-upgrade

E.install

A..history_bash

B..bash_histfile
.history

C.

D..bashrc_history

E..bash_history

A.When the shell establishes the redirection it overwrites the target file before the redirected command starts and opens itfor reading.

B.Redirection for shell commands do not work using the > character. It only works using the | character instead.

C.The command sed did not match anything in that file therefore the output is empty.

D.The file order is incorrect. The destination file must be mentioned before the command to ensure redirection.