QUESTION 223
A Linux administrator needs to switch from text mode to GUI. Which of the following runlevels will start the GUI by default?

QUESTION 224
A Linux engineer needs to block an incoming connection from the IP address 2.2.2.2 to a secure shell server and ensure the originating IP address receives a response that a firewall is blocking the connection. Which of the following commands can be used to accomplish this task?

QUESTION 225
A junior administrator updated the PostgreSQL service unit file per the data-base administrator’s recommendation. The service has been restarted, but changes have not been applied. Which of the following should the administrator run for the changes to take effect?

QUESTION 226
A Linux administrator is adding a user’s local Linux account to the accounting group. The user is also a member of the finance group. Which of the following is the BEST way to add the user to the accounting group while still maintaining the user’s existing group members ships?

QUESTION 227
A Linux administrator rebooted a server. Users then reported some of their files were missing. After doing some troubleshooting, the administrator found one of the filesystems was missing. The filesystem was not listed in /etc/f stab and might have been mounted manually by someone prior to reboot. Which of the following would prevent this issue from reoccurring in the future?

QUESTION 228
A Linux administrator provisioned a new web server with custom administrative permissions for certain users. The administrator receives a report that user1 is unable to restart the Apache web service on this server. The administrator reviews the following output:

Which of the following would most likely resolve the issue while maintaining a least privilege security model?

QUESTION 229
A systems administrator is unable to reach other devices on the network and the Internet. The server is configured with the IP address 192.169.1.50/24 on eth0. The server’s router is
192.168.1.1. The administrator reviews the output of route -n:

Which of the following commands should the administrator run to correct the issue?

QUESTION 230
A Linux administrator needs to connect securely to a remote server in order to install application software. Which of the following commands would allow this connection?

QUESTION 231
The users of a Linux system are unable to use one of the application filesystems. The following outputs have been provided:
bash
$ cd /app
$ touch file
touch: cannot touch ‘file’: Readonly file system
Output 2
/dev/sdcl on /app type ext4 (ro,relatime,seclabel,data=ordered)
Output 3
/dev/sdcl /app ext4 defaults 0 0
Output 4
[302.048075] Buffer I/O error on dev sdcl, logical block 0, async page read
[302.048490] EXT4-fs (sdcl): Attempt to read block from filesystem resulted in short read while trying to re- open /dev/sdcl Which of the following actions will resolve this issue?

QUESTION 232
A new Linux systems administrator just generated a pair of SSH keys that should allow connection to the servers.
Which of the following commands can be used to copy a key file to remote servers? (Choose two.)

QUESTION 233
An administrator accidentally installed the httpd RPM package along with several dependencies. Which of the following options is the best way for the administrator to revert the package installation?

QUESTION 234
An administrator is using a configuration management tool to define a system’s configuration. The defined configuration can be used to provision new systems, rebuild existing systems, or roll back systems to their original baseline configurations.
Which of the following BEST describes what the administrator is doing?

QUESTION 235
Which of the following would significantly help to reduce data loss if more than one drive fails at the same time?

QUESTION 236
A user is asking the systems administrator for assistance with writing a script to verify whether a file exists.
Given the following:

Which of the following commands should replace the <CONDITIONAL> string?

QUESTION 237
Which of the following commands allow an administrator to determine if the current system is a virtual machine?

QUESTION 238
A Linux administrator has logged in to a server for the first time and needs to know which services are allowed through the firewall. Which of the following options will return the results for which the administrator is looking?