QUESTION NO: 1
While using vi as superuser. the attempt to save a file while quitting the editor leads to an error indicating that the file is read-only. How can the file permissions be overridden to save the edits to the file and quit the editor?
While using vi as superuser. the attempt to save a file while quitting the editor leads to an error indicating that the file is read-only. How can the file permissions be overridden to save the edits to the file and quit the editor?
Correct Answer: D
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QUESTION NO: 2
Which of the following chmod commands changes the permission of the file text. txt to 750?
Which of the following chmod commands changes the permission of the file text. txt to 750?
Correct Answer: E
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QUESTION NO: 3
What command creates a new directory? (Specify ONLY the command without any path or parameters.)
What command creates a new directory? (Specify ONLY the command without any path or parameters.)
Correct Answer:
mkdir
Explanation
The command mkdir (short for make directory) creates a new directory with the specified name. The command takes one or more arguments, which are the names of the directories to be created. If the name contains spaces or other special characters, it should be enclosed in quotes. For example, mkdir "My Documents" creates a directory named My Documents. The command also accepts some options, such as -p, which creates the parent directories if they do not exist, or -m, which sets the permissions of the new directory.
For example, mkdir -p -m 755 /usr/local/bin creates the directory /usr/local/bin and its parent directories /usr and /usr/local, and sets the permissions of /usr/local/bin to 755 (read, write and execute for the owner, read and execute for the group and others). References:
[mkdir(1) - FreeBSD Manual Pages]
[How to Create a Directory in Linux - Linuxize]
Explanation
The command mkdir (short for make directory) creates a new directory with the specified name. The command takes one or more arguments, which are the names of the directories to be created. If the name contains spaces or other special characters, it should be enclosed in quotes. For example, mkdir "My Documents" creates a directory named My Documents. The command also accepts some options, such as -p, which creates the parent directories if they do not exist, or -m, which sets the permissions of the new directory.
For example, mkdir -p -m 755 /usr/local/bin creates the directory /usr/local/bin and its parent directories /usr and /usr/local, and sets the permissions of /usr/local/bin to 755 (read, write and execute for the owner, read and execute for the group and others). References:
[mkdir(1) - FreeBSD Manual Pages]
[How to Create a Directory in Linux - Linuxize]
QUESTION NO: 4
Which line in a cron job runs myscript once per hour?
Which line in a cron job runs myscript once per hour?
Correct Answer: D
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QUESTION NO: 5
Which BSD command lists, adds, or deletes swap devices?
Which BSD command lists, adds, or deletes swap devices?
Correct Answer: D
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QUESTION NO: 6
Which of the following lines in /etc/fstab mounts the device /dev/cd0a to /cdrom?
Which of the following lines in /etc/fstab mounts the device /dev/cd0a to /cdrom?
Correct Answer: E
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QUESTION NO: 7
Which command shows all processes owned by the user bob?
Which command shows all processes owned by the user bob?
Correct Answer: C
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