A.update

B.dist-upgrade

C.install

D.full-upgrade

E.auto-update

A.chown dave:staff data.txt

B.chown -u dave -g staff data.txt

C.chown dave+staff data.txt

D.chown --user dave --group staff data.txt

E.chown dave/staff data.txt

A.SIGKILL(9)

B.SIGTERM(15)

C.SIGQUIT(3)

D.SIGHUP(1)

A.The backup runs faster because hard links are asynchronous operations, postponing the copy operation to a later point in time.

B.The backup consumes less space because the hard links point to the same data on disk instead of storing redundant copies.

C.The backup is guaranteed to be uncharged because a hard linked file cannot be modified after its creation.

D.The old backups can be moved to slow backup media, such as tapes, while still serving as hard link target in new backups.

E.The backup runs faster because, instead of copying the data of each file, hard links only change file system meta data.

A.myapp 0>&1 | cat > file1.log

B.myapp | cat > file1.log

C.cat < myapp | cat > file1.log

D.myapp | tee file1.log

E.tee myapp file1.log