최신Lpi LPIC-1 Exam 102, Part 2 of 2, version 5.0 - 102-500무료샘플문제
문제1
When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?
When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?
정답: C
설명: (ITDumpsKR 회원만 볼 수 있음)
문제2
When the command echo $ outputs 1, which of the following statements is true?
When the command echo $ outputs 1, which of the following statements is true?
정답: A
설명: (ITDumpsKR 회원만 볼 수 있음)
문제3
What output will the following command sequence produce?
echo '1 2 3 4 5 6' | while read a b c; do
echo result: $c $b $a;
done
What output will the following command sequence produce?
echo '1 2 3 4 5 6' | while read a b c; do
echo result: $c $b $a;
done
정답: C
설명: (ITDumpsKR 회원만 볼 수 있음)
문제4
Which of the following words is used to restrict the records that are returned from a SELECT SQL query based on a supplied criteria for the values in the records?
Which of the following words is used to restrict the records that are returned from a SELECT SQL query based on a supplied criteria for the values in the records?
정답: A
설명: (ITDumpsKR 회원만 볼 수 있음)
문제5
On a dual boot system, every time the system is booted back into Linux the time has been set backward by one day. Which of the following commands will correct the problem?
On a dual boot system, every time the system is booted back into Linux the time has been set backward by one day. Which of the following commands will correct the problem?
정답: D
설명: (ITDumpsKR 회원만 볼 수 있음)
문제6
Fill in Blanks
An administrator wants to determine the geometry of a particular window in X, so she issues the __________ -metric command and then clicks on the window.
Fill in Blanks
An administrator wants to determine the geometry of a particular window in X, so she issues the __________ -metric command and then clicks on the window.
정답:
usrbinxwininfoxwininfo
Explanation:
The xwininfo command is a utility for displaying information about windows in X. It can show various attributes of a window, such as its location, size, depth, border width, visual class, colormap, map state, and event masks. The -metric option specifies that all dimensions should be displayed in metric units (millimeters) rather than pixels. By issuing the xwininfo -metric command and then clicking on a window, the administrator can determine the geometry of that window, including the decorations, in millimeters. Reference:
xwininfo(1) - Arch manual pages
[command line -
Explanation:
The xwininfo command is a utility for displaying information about windows in X. It can show various attributes of a window, such as its location, size, depth, border width, visual class, colormap, map state, and event masks. The -metric option specifies that all dimensions should be displayed in metric units (millimeters) rather than pixels. By issuing the xwininfo -metric command and then clicking on a window, the administrator can determine the geometry of that window, including the decorations, in millimeters. Reference:
xwininfo(1) - Arch manual pages
[command line -
문제7
Which of the following commands can be used to display the local routing table? (Choose TWO correct answers.)
Which of the following commands can be used to display the local routing table? (Choose TWO correct answers.)
정답: B,C
설명: (ITDumpsKR 회원만 볼 수 있음)
문제8
In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)
In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)
정답:
etccronallow
Explanation:
The /etc/cron.allow file is a file that contains a list of users who are allowed to use the cron scheduling system. The cron scheduling system is a way of running commands or scripts at specified times or intervals. Users can create their own cron jobs by using the crontab command, which edits a file called crontab that stores the user's scheduled tasks. However, not all users may have access to the crontab command or the cron system. The access is controlled by two files: /etc/cron.allow and /etc/cron.deny. If the /etc/cron.allow file exists, then only the users listed in this file can use the crontab command and the cron system. The file should have one user name per line. If the /etc/cron.allow file does not exist, then the /etc/cron.deny file is checked. If this file exists, then the users listed in this file are denied access to the crontab command and the cron system. If neither file exists, then the access depends on the configuration of the cron daemon, which is the program that runs the cron jobs. By default, only the root user can use the cron system if no files exist. The root user can always use the cron system regardless of the existence or content of these files. To create or edit the /etc/cron.allow file, the root user needs to use a text editor such as vi, nano, or emacs. For example, to allow the users alice and bob to use the cron system, the root user can use the following command:
sudo vi /etc/cron.allow
And then add the following lines to the file:
alice bob
And then save and exit the file. Reference:
How cron.allow and cron.deny can be used to limit access to crontab for ...
/etc/cron.allow - Linux Bash Shell Scripting Tutorial Wiki
Linux / UNIX Restrict at / cron Usage To Authorized Users
Explanation:
The /etc/cron.allow file is a file that contains a list of users who are allowed to use the cron scheduling system. The cron scheduling system is a way of running commands or scripts at specified times or intervals. Users can create their own cron jobs by using the crontab command, which edits a file called crontab that stores the user's scheduled tasks. However, not all users may have access to the crontab command or the cron system. The access is controlled by two files: /etc/cron.allow and /etc/cron.deny. If the /etc/cron.allow file exists, then only the users listed in this file can use the crontab command and the cron system. The file should have one user name per line. If the /etc/cron.allow file does not exist, then the /etc/cron.deny file is checked. If this file exists, then the users listed in this file are denied access to the crontab command and the cron system. If neither file exists, then the access depends on the configuration of the cron daemon, which is the program that runs the cron jobs. By default, only the root user can use the cron system if no files exist. The root user can always use the cron system regardless of the existence or content of these files. To create or edit the /etc/cron.allow file, the root user needs to use a text editor such as vi, nano, or emacs. For example, to allow the users alice and bob to use the cron system, the root user can use the following command:
sudo vi /etc/cron.allow
And then add the following lines to the file:
alice bob
And then save and exit the file. Reference:
How cron.allow and cron.deny can be used to limit access to crontab for ...
/etc/cron.allow - Linux Bash Shell Scripting Tutorial Wiki
Linux / UNIX Restrict at / cron Usage To Authorized Users
문제9
Fill in Blanks
The ________ command is used to add a group to the system.
Fill in Blanks
The ________ command is used to add a group to the system.
정답:
groupaddusrsbingroupadd
Explanation:
The groupadd command creates a new group using the options specified on the command line and the default values from the /etc/login.defs file. It adds an entry for the new group to the /etc/group and /etc/gshadow files. Only the root user or a user with sudo privileges can create new groups using this command. The general syntax for the groupadd command is as follows:
groupadd [OPTIONS] GROUPNAME
Some of the common options for the groupadd command are:
-g, --gid GID: Specify the numeric group ID for the new group. If not given, the system will assign the next available GID from the range of group IDs specified in the login.defs file.
-r, --system: Create a system group with a GID chosen from the range of system group IDs specified in the login.defs file. System groups are usually used for some special system operation purposes, like creating backups or doing system maintenance.
-f, --force: Suppress the error message if the group already exists and exit successfully. This option is useful for scripts that need to ensure the existence of a group.
-K, --key KEY=VALUE: Override the default values from the /etc/login.defs file. The valid keys are GROUP_MIN_ID, GROUP_MAX_ID, SYS_GROUP_MIN_ID, SYS_GROUP_MAX_ID, and GID_INCREMENT.
Reference:
https://linuxize.com/post/how-to-create-groups-in-linux/
https://linuxhandbook.com/groupadd-command/
Explanation:
The groupadd command creates a new group using the options specified on the command line and the default values from the /etc/login.defs file. It adds an entry for the new group to the /etc/group and /etc/gshadow files. Only the root user or a user with sudo privileges can create new groups using this command. The general syntax for the groupadd command is as follows:
groupadd [OPTIONS] GROUPNAME
Some of the common options for the groupadd command are:
-g, --gid GID: Specify the numeric group ID for the new group. If not given, the system will assign the next available GID from the range of group IDs specified in the login.defs file.
-r, --system: Create a system group with a GID chosen from the range of system group IDs specified in the login.defs file. System groups are usually used for some special system operation purposes, like creating backups or doing system maintenance.
-f, --force: Suppress the error message if the group already exists and exit successfully. This option is useful for scripts that need to ensure the existence of a group.
-K, --key KEY=VALUE: Override the default values from the /etc/login.defs file. The valid keys are GROUP_MIN_ID, GROUP_MAX_ID, SYS_GROUP_MIN_ID, SYS_GROUP_MAX_ID, and GID_INCREMENT.
Reference:
https://linuxize.com/post/how-to-create-groups-in-linux/
https://linuxhandbook.com/groupadd-command/
문제10
Which command can be used to delete a group from a Linux system?
Which command can be used to delete a group from a Linux system?
정답: C
설명: (ITDumpsKR 회원만 볼 수 있음)
문제11
What command displays all aliases defined in the current shell? (Specify the command without any path information)
What command displays all aliases defined in the current shell? (Specify the command without any path information)
정답:
aliasaliasp
Explanation:
The alias command is used to create, list, or remove aliases in the current shell. An alias is a short name that refers to another command, usually with some options or arguments. Aliases are useful for saving typing time, avoiding spelling errors, or customizing the behavior of commands. To list all the aliases defined in the current shell, we can use the alias command without any arguments. This will print the aliases in the format of alias name='command'123. For example:
$ alias alias cp='cp -i' alias l='ls -CF' alias la='ls -A' alias ll='ls -alF' alias mv='mv -i' alias rm='rm -i' The output shows that some common commands, such as cp, mv, and rm, have aliases that add the -i option, which prompts the user before overwriting or deleting files. The l, la, and ll aliases are shortcuts for different variations of the ls command, which lists files and directories123.
Explanation:
The alias command is used to create, list, or remove aliases in the current shell. An alias is a short name that refers to another command, usually with some options or arguments. Aliases are useful for saving typing time, avoiding spelling errors, or customizing the behavior of commands. To list all the aliases defined in the current shell, we can use the alias command without any arguments. This will print the aliases in the format of alias name='command'123. For example:
$ alias alias cp='cp -i' alias l='ls -CF' alias la='ls -A' alias ll='ls -alF' alias mv='mv -i' alias rm='rm -i' The output shows that some common commands, such as cp, mv, and rm, have aliases that add the -i option, which prompts the user before overwriting or deleting files. The l, la, and ll aliases are shortcuts for different variations of the ls command, which lists files and directories123.
문제12
What is true about the ntpdate command?
What is true about the ntpdate command?
정답: B
설명: (ITDumpsKR 회원만 볼 수 있음)
문제13
Which of the following nmcli subcommands exist? (Choose two.)
Which of the following nmcli subcommands exist? (Choose two.)
정답: A,C
설명: (ITDumpsKR 회원만 볼 수 있음)
문제14
Which mechanism does ggfe use to interact with the SSH agent?
Which mechanism does ggfe use to interact with the SSH agent?
정답: D