Linux Foundation LFCS Exam Success: Linux Foundation Certified System Administrator Complete Study and Preparation Tips

tr '\s' ' ' < a.txt > b.txt

tr -c ' ' < a.txt > b.txt

tr -d ' ' < a.txt > b.txt

tr -r ' ' '\n' < a.txt >b.txt

tr -s ' ' < a.txt > b.txt

cat

foo bar

tee bar

bar

foo

/lib/init.so

/sbin/init

/etc/rc.d/rcinit

/proc/sys/kernel/init

/boot/init

The list of users that belong to the group.

The home directory of the group.

The name of the group.

The description of the group.

The password of the group.

It mounts all available filesystems onto the current directory.

It shows all mounted filesystems.

It mounts all user mountable filesystems for the current user.

It mounts all filesystems listed in /etc/fstab which have the option auto set.

It mounts all filesystems listed in /etc/fstab which have the option noauto set.

Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.

Port 23 is the well known port for the SSH service which provides secure logins.

Port 23 is the well known port for the rlogin service which is SSL secured by default.

Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.

route del default

ifconfig unset default

netstat -r default

ip route del default

sysctl ipv4.default_gw=0

.bash_history

.bash_histfile

.history

.bashrc_history

.history_bash

CASE

FROM

WHERE

IF

0

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5

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