Which of the following commands would give the most accurate overview of mounted disk devices (without showing much information about mounted system devices)?
Answer :
df -T
Explanation :
The df -h command shows mounted devices and the amount of disk space currently in use on these devices. The -T option helps in recognizing real file systems (as opposed to kernel interfaces) because it shows the file system type as well.
Which command enables you to analyze whether there are scripts in an RPM package file you have just downloaded?
Answer :
rpm -qp --scripts packagename.rpm
Explanation :
The --scripts option checks whether there are scripts in an RPM package. If you want to query the package file and not the database of installed RPMs, you need to add the -p option to the -q option, which is used to perform RPM queries.
Which of the following umask settings meets the following requirements:
--> Grants all permissions to the owner of the file.
--> Grants read permissions to the group owner of the file.
--> Grants no permissions to others.
Answer :
“027”
Explanation :
In a umask, 0 in the first position gives all permissions to the file owner. 2 in the second position ensures that members of the group owner can read files, and 7 in the third position takes away all permissions for others.
What is the name of the command that shows kernel events since booting?
Answer :
dmesg
Explanation :
The dmesg utility shows the contents of the kernel ring buffer. This is the area of memory where the Linux kernel logs information to and gives a clear overview of recent kernel events.
Which of the following files may be involved in authenticating with SSH keys?
Answer :
~/.ssh/id_rsa
Explanation :
These identity keys are created with the file names
of id_type for the private key and id_type.pub for the public key. The key in option E
is a private key using the RSA algorithm.
A system administrator has created a backup archive and transferred the file to another system across the network. Which utilities can be used to check the archive files' integrity? (Choose all that apply
Answer :
The rsync utility
Explanation :
Both the md5sum and sha512sum utilities produce hashes on files, which can be
compared to determine if file corruption occurred, such as when transferring a file over the
Network.
