A.shutdown -c -r now

B.shutdown -f now

C.shutdown -F -r now

D.reboot-f

E.fsck -r

A.It holds miscellaneous system configuration options that are set via the sysctl utility when the system boots.

B.It identifies system services that are started directly by the init process when the computer boots.

C.It specifies the order in which system services are started when the computer boots.

D.It specifies the filesystems that are mounted at boot time or that may be mounted manually by ordinary users.

A.echo 'root' > /proc/fs/sda1/label

B.tune2fs -L root /dev/sda1

C.relabel /dev/sda1 root

D.labelfs --device /dev/sda1 root

A./etc/profile is a tcsh logout script; /etc/bashrc holds bash environment variables.

B./etc/profile holds user login statistics; /etc/bashrc holds user shell preferences.

C./etc/profile holds user account data; /etc/bashrc is a bash startup script.

D./etc/profile is a login script; /etc/bashrc is a non-login script.