I have recently faced one interview in which I was asked all this questions on various flavors of Linux. 

I have included my answers for which I know about the technology.

All questions are for command line use in Linux environments. 

Q: How do you display your running kernel version? (Solaris, AIX, Linux)

A: Linux # uname –r , Solaris # showrev
 

Q: Which command do you use to display a table of running processes? (Solaris, AIX, Linux)

A: Linux # ps –ef and top , Solaris # prstat 
 

Q: Which file do you modify to configure a domain name resolver? (Solaris, AIX, Linux)

A: Linux # /etc/resolv.conf , Solaris # /etc/resolv.conf
 

Q: Which file contains a list of locally defined hostnames and corresponding IP addresses? (Solaris, AIX, Linux)

A: Linux # /etc/hosts , Solaris # /etc/hosts and linked file /etc/inet/hosts 
 

Q: How do you display a routing table? (Solaris, AIX, Linux)

A: Linux # ip route show or #netstat –nr or #route –n and Solaris # netstat –nr and #route -n
 

Q: which command would you use to create an OS user on Solaris and Linux?

A: Linux # useradd and Solaris #useradd
 

Q: Which file contains passwords for local users on Solaris, Linux and on AIX?

A: Linux #/etc/shadow and Solaris # /etc/shadow
 

Q: Which command would you use to list partitions on Linux?

A: Linux # mount –l or # df -kh
 

Q: Which command/commands would you use to manage installed packages on RedHat Linux?

A: Linux # rpm 
 

Q: Which file has a list of filesystems to be mounted at boot time on Solaris, Linux and AIX?

A: Linux # /etc/fstab and Solaris #/etc/vfstab

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