Basic Linux Interview Questions and Answers – Part II

Continuing the Interview Series, we are giving 10 Questions here, in this article. These questions and the questions in the future articles doesn’t necessarily means they were asked in any interview. We are presenting you an interactive learning platform through these kind of posts, which surely will be helpful.

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Q.1: Which command is used to record a user login session in a file?

1. macro
2. read
3. script
4. record
5. sessionrecord

Let’s record the user’s login session with script command as shown.

[[email protected] ~]# script my-session-record.txt

Script started, file is my-session-record.txt

The content of log file ‘my-session-record.txt’ can be views as:

[[email protected] ~]# nano my-session-record.txt

script started on Friday 22 November 2013 08:19:01 PM IST
[[email protected] ~]# ls
^[[0m^[[01;34mBinary^[[0m ^[[01;34mDocuments^[[0m ^[[01;34mMusic^[[0m $
^[[01;34mDesktop^[[0m ^[[01;34mDownloads^[[0m my-session-record.txt ^[[01;34$

Q.2: The kernel log message can be viewed using which of the following command?

1. dmesg
2. kernel
3. ls -i
4. uname
5. None of the above

[[email protected] ~]# dmesg

Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 2.6.32-279.el6.i686 ([email protected]) (gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Fri Jun 22 10:59:55 UTC 2012
KERNEL supported cpus:
  Intel GenuineIntel
  AMD AuthenticAMD
  NSC Geode by NSC
  Cyrix CyrixInstead
  Centaur CentaurHauls
  Transmeta GenuineTMx86
  Transmeta TransmetaCPU
  UMC UMC UMC UMC
Disabled fast string operations
BIOS-provided physical RAM map:
...

Q.3: Which command is used to display the release of Linux Kernel?

1. uname -v
2. uname -r
3. uname -m
4. uname -n
5. uname -o

[[email protected] ~]# uname -r

2.6.32-279.el6.i686

Q.4: Which command is used to identify the types of file?

1. type
2. info
3. file
4. which
5. ls

[[email protected] ~]# file wtop

wtop: POSIX shell script text executable

Q.5: Which command locate the binary, source and man page of a command?

[[email protected] ~]# whereis /usr/bin/ftp

ftp: /usr/bin/ftp /usr/share/man/man1/ftp.1.gz

Q.6: When a user login, which files are called for user profile, by default??

[[email protected] ~]# ls -al
-rw-r--r--.  1 tecmint     tecmint            176 May 11  2012 .bash_profile
-rw-r--r--.  1 tecmint     tecmint            124 May 11  2012 .bashrc

Q.7: The ‘resolv.conf’ file is a configuration file for?

[[email protected] ~]# cat /etc/resolv.conf

nameserver 172.16.16.94

Q.8: Which command is used to create soft link of a file?

1. ln
2. ln -s
3. link
4. link -soft
5. None of the above

[[email protected] ~]# ln -s /etc/httpd/conf/httpd.conf httpd.original.conf

Q.9: The command ‘pwd’ is an alias of command ‘passwd’ in Linux?

[[email protected] ~]# pwd

/home/tecmint

[[email protected] ~]# passwd
Changing password for user root.
New password:
Retype new password:

Q.10: How will you check pci devices vendor and version on a Linux?

[[email protected] ~]# lspci

00:00.0 Host bridge: Intel Corporation 5000P Chipset Memory Controller Hub (rev b1)
00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 2-3 (rev b1)
00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 4-5 (rev b1)
00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port 6-7 (rev b1)
00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA Engine (rev b1)
...

That’s all for now. I hope these above questions might be very helpful to you. In our next weekend we again come-up with some new set of questions. Till then stay healthy, tuned and connected to Tecmint.