REDHAT INTERVIEW QUESTIONS

                          Red hat interview questions 

Q: – How are devices represented in UNIX?
All devices are represented by files called special files that are located in /dev directory.
Q: – Tell me the steps to remove the swap file?
Firstly disable the swap file by “swapoff” command.
Remove Swap file entry from /etc/fstab file.
Now remove the swap file by “rm” command.
Q: – What can we do with “parted” command or utility?
– View the existing partition table
– Add partitions from free space or additional hard drives
– Change the size of existing partitions

Q: – What is 'inode'?

All UNIX files have its description stored in a structure called 'inode'. The inode contains info about the file-size, its location, time of last access, time of last modification, permission and so on. Directories are also represented as files and have an associated inode.

Q: – Can we resize the size of a partition?

Yes, we can resize the size of partition by “parted” command.
#parted /dev/sda

print

To resize the partition, use the resize command followed by the minor number for the partition, the starting place in megabytes, and the end place in megabytes. For example:

resize 3 1024 2048

After resizing the partition, use the print command to confirm that the partition has been resized correctly, is the correct partition type, and is the correct file system type.

Q: – What is LVM?

LVM stands for Logical Volume Manager. LVM, is a storage management solution that allows administrators to divide hard drive space into physical volumes (PV), which can then be combined into logical volume groups (VG), which are then divided into logical volumes (LV) on which the filesystem and mount point are created. 

Q. How will you add a new user (say, tux) to your system?

1. useradd command
2. adduser command
3. linuxconf command
4. All of the above
5. None of the above

Answer: All of the above commands i.e., useradd, adduser and linuxconf will add an user to the Linux system.

Q. How many primary partition is possible on one drive?

1. 1
2. 2
3. 4
4. 16

Answer : There are a maximum of ‘4‘ primary partition possible on a drive.

Q. The default port for Apache/Http is?

1. 8080
2. 80
3. 8443
4. 91
5. None of the above.

Answer : By default Apache/Http is configured on port 80.

Q. What does GNU stand for?

1. GNU’s not Unix
2. General Unix
3. General Noble Unix
4. Greek Needed Unix
5. None of the above

Answer : GNU stands for ‘GNU‘s not Unix‘.

Q. You typed at shell prompt “mysql” and what you got in return was “can’t connect to local MySQL server through socket ‘/var/mysql/mysql.sock’”, what would you check first.

Answer : Seeing the error message, I will first check if mysql is running or not using commands service mysql status or service mysqld status. If mysql service is not running, starting of the service is required.

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Q. How to Mount a windows ntfs partition on Linux?

Answer : First install ntfs­3g pack on the system using apt or yum tool and then use “mount sudo mount ­t ntfs­3g /dev/<Windows­partition>/<Mount­point>” command to mount Windows partition on Linux.

Q. From the following which is not an RPM based OS.?

1. RedHat Linux
2. Centos
3. Scientific Linux
4. Debian
5. Fedora

Answer : The ‘Debian‘ operating system is not an RPM based and all listed above are ‘RPM‘ based except Debian.

Q. Which command can be used to rename a file in Linux.?

1. mv
2. ren
3. rename
4. change
5. None of the Above

Answer : The mv command is used to rename a file in Linux. For example, mv /path_to_File/original_file_name.extension /Path_to_File/New_name.extension.

Q. Which command is used to create and display file in Linux?

1. ed
2. vi
3. cat
4. nano
5. None of the above

Answer : The ‘cat‘ command can be used to create and display file in Linux.

Q. What layer protocol is responsible for user and the application program support such as passwords, resource sharing, file transfer and network management?

1. Layer 4 protocols
2. Layer 5 protocols
3. Layer 6 protocols
4. Layer 7 protocols
5. None of the above

Answer : The ‘Layer 7 Protocol‘ is responsible for user and the application program support such as passwords, resource sharing, file transfer and network management.