1z1-100 試験問題を無料オンラインアクセス

As root, you enter a crontab command as shown;
[root@FAROUT cron.daily] # crontab -1
*/2 * * * * vmstat
0 0 1 1-5 * iostat
[root@FAROUT cron.daily] #
Which three statements are true concerning the two cron jobs listed?

• A.The iostat command runs at midnight of every day except Sunday.
• B.All cron job output is sent to /var/log/messages.
• C.The iostat command runs at midnight on the first day of each of the first five months of the year.
• D.The vmstat command runs every other hour.
• E.All cron job output is sent to the root user's mall.
• F.The vmstat command runs every second minute.
• G.The vmstat command runs twice per hour.

Which statement is FALSE concerning the use of OpenSSH utilities? (Choose the best answer.)

• A.ssh may be used to execute a single command on a remote host instead of executing the login shell on the remote host
• B.scp always requires a passphrase to be used
• C.sftp may be used to execute a command on the remote server
• D.scp permits copies between two remote hosts

Which three actions may be performed using the date command in Oracle Linux?

• A.Displaying the time and date in the future
• B.Displaying the time and date in the past
• C.Setting the hardware clock from the current system time
• D.Displaying the current time in an administrator-specified format
• E.Setting the system time from the hardware clock
• F.Synchronizing the system time from an ntp server

Which three settings can be controlled by using the chage breemar command as the root user, to modify the parameters in the /etc/shadow file?

• A.The maximum number of failed login attempts on the breemar account before the account is locked
• B.The expiration date of the breemar account
• C.The number of days after the breemar account is locked, that it becomes expired
• D.The maximum number of days that must elapse between password changes by the user breemar before the password becomes invalid
• E.The number of days after the breemar account is locked, that it becomes unlocked
• F.The minimum number of days that must elapse between password changes by the user breemar

Which two statements are true regarding the use of the ssh-agent and ssh-add commands?

• A.The ssh-agent is used to hold only public keys.
• B.The ssh-agent is used to hold private keys.
• C.The ssh-add command retries the most recently saved passphrase if multiple key files are used.
• D.The ssh-add command may ask for a passphrase each time the same key is required by the same user in the same shell.
• E.The ssh-add command asks for the passphrase only the first time a key is required by the same user in the same shell.