Which of the following outputs will the below command produce? seq 1 5 20
A. 1 6 11 16
B. 1 5 10 15
C. 1 2
D. 2 3 4 5
E. 5 10 15 20
When using ssh, which of the following can an administrator do to recover a lost passphrase for a DSA or RSA authentication key?
A. Run the ssh-keygen command.
B. Run the ssh --recover command.
C. A lost passphrase cannot be recovered.
D. Decrypt the authentication key with gpg.
E. Decrypt the authentication key with ssh --decrypt.
Which of the following crontab entries could be used to set the system time at regular intervals?
A. 1 0 * * * date $d $t $24
B. 1 0 * * * settime $d $t $24
C. 1 0 * * * date D. 1 0 * * * /usr/sbin/runcron date E. 1 0 * * * /usr/sbin/ntpdate ntp1.digex.net > /dev/null 2>and1
On a system running the K Display Manager, when is the /etc/kde4/kdm/Xreset script automatically executed?
A. When KDM starts
B. When a user's X session exists
C. When KDM crashes
D. When X is restarted
E. When X crashes
Which of the following is the BEST way to temporarily suspend a user's ability to interactively login?
A. Changing the user's UID.
B. Changing the user's password.
C. Changing the user's shell to /bin/false.
D. Removing the user's entry in /etc/passwd.
E. Placing the command logout in the user's profile.
To test a shell script called myscript, the environment variable FOOBAR must be removed temporarily. How can this be done?
A. unset -v FOOBAR
B. set -a FOOBAR=""
C. env -u FOOBAR myscript
D. env -i FOOBAR myscript
Which of the following commands is used to display user resource limits?
A. uname
B. limit -a
C. usrlmt
D. ulimit
Which of the following lines would an administrator find in the file /etc/nsswitch.conf?
A. order hosts,bind
B. 192.168.168.4 dns-server
C. hosts: files dns
D. domain mycompany.com
Which of the following commands can an administrator use to change a user's password expiry information? (Select THREE).
A. usermod
B. passwd
C. chattr
D. chage
E. chsh
Which of the following statements is true regarding the below /etc/resolv.conf file? search example.com
127.0.0.1 208.77.188.166
A. There is a syntax error.
B. If DNS queries to the localhost fail, the server 208.77.188.166 will be queried.
C. example.com will be appended to all host lookups.
D. The DNS servers at 127.0.0.1 and 208.77.188.166 will be queried in a round robin fashion.
E. The DNS server with the shortest ping time will be queried first. If the lookup fails, the second server will be queried.
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