Answer:
b. This would set the group ownership of file1 to root.
Explanation:
Linux allows user to have his own files and regulate the ability of other users to access them. The <em>chown</em> command allows you to use the appropriate utility to change the owner of a file or directory.
The basic command syntax is as follows:
# chown [options] <owner name: owner group name> <file or directory name>
For example, if you want to give a user <em>root</em> opportunity to use the <em>file1.txt</em> file as he wishes, you can use the following command:
# chown root file1.txt
In addition to changing the owner of a file, the group of its owners or both can be changed at the same time. Use a colon to separate the username and user group name (without the space character):
# chown user2:group2 file1.txt
As a result, the user with the name <em>user2</em> will become the owner of the <em>file1.txt</em> and its group will become <em>group2</em>.
In your case omitting username
# chown :root file1.txt
will change owner group only.
The motherboard contains the central electronic components of the computer.
Answer: B. Multi-user, multitasking.
Explanation:
Multiuser/Multitasking operating system refers to an operating system that's powerful and supports more than one user at a time, and can also perform more than one task at a time.
The operating system allows many users to use the programs which are running concurrently on a single network server. It is the computer operating system that would be best for a large corporation. An example is UNIX.
Answer:
ain characteristics of wastewater are classified below.
Physical Characteristics. · Turbidity. · Color. ...
Chemical Characteristics due to Chemical Impurities. · Chemical Oxygen Demand (COD) · Total Organic Carbon (TOC) ...
Biological Characteristics due to Contaminants. · Biochemical Oxygen Demand (BOD)
