Infocepts Technologies Linux System Administrator Interview Questions, Process, and Tips

Linux

Q1. What is lvm and why is it required?
Ans. 
LVM stands for Logical Volume Manager. It is required for flexible management of storage devices in Linux systems.
• LVM allows for the creation of logical volumes that span multiple physical disks.

• It enables resizing of logical volumes without the need to unmount the file system.

• LVM also provides features such as snapshots and mirroring for data backup and redundancy.

• It is commonly used in enterprise environments where s...read more
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Q2. Which command is used to check the memory status?
Ans. 
The command used to check memory status is 'free'.
• The 'free' command displays the total amount of free and used physical and swap memory in the system.

• It also shows the buffers and cache used by the kernel.

• The output of the 'free' command can be customized using various options like '-h' for human-readable format and '-s' for a continuous display.

• Another command that can be used to check memory status is 'top', which d...read more
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Q3. What is the function of grep command?
Ans. 
grep command is used to search for a specific pattern in a file or output.
• Used to search for a specific pattern in a file or output

• Can be used with regular expressions

• Can be used to search for multiple patterns at once

• Can be used with other commands like find and ls

• Example: grep 'error' file.txt
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Q4. What is netstat command
Ans. 
Netstat is a command-line tool used to display network connections, routing tables, and network interface statistics.
• Displays active network connections and their status

• Shows routing tables and network interface statistics

• Can be used to troubleshoot network issues

• Can be used to identify open ports and listening services

• Syntax: netstat [options]
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Q5. What is the pink command?
Ans. 
The pink command is not a valid Linux command.
• There is no pink command in Linux.

• It is possible that the interviewer is testing the candidate's honesty and ability to admit when they don't know something.

• The candidate should respond honestly and explain that they are not familiar with the pink command.

• Alternatively, the candidate could ask for clarification or context to better understand the question.
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Q6. Maximum size (in bytes) of the filename in Linux can be?
Ans. 
The maximum size of a filename in Linux is 255 bytes.
• The maximum length includes the entire path and filename.

• The limit is imposed by the file system, not the operating system.

• Some file systems, such as ext4, support longer filenames with special configuration.

• Long filenames can cause issues with some applications and scripts.
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