Tuesday, June 14, 2011

Linux Interview Questions

1>  Diff between RHEL 4 & 5 ?
2>  About boot process in sort?
3>  Types of DNS?
4>  how dns works?
5>  what is squid?
6>  port number of data ftp, ftp, telnet, smtp, sql
7>  what is sendmail hows it's works
9>  How to block downloading in squid
10> How you handle Load on server?
11> Fields in crontab?
12> Any backup tools you know?
13> what is amanda why to use?
14> How to upadte your server?
15> rpm commands to update, erase, install etc...
16> Use squid to do authentication of users on browser?
17> USe of NFS and samba?
18> Diff NfS & Samba?
19> What is SeLinux?
20> DEfault cache size in Squid?
21> I want to assign NISdomainname via DHCP is it possible how?
22> How to setup networking IP doaminname etc...
23> What is & Difference between find and grep
24> About Raid tool used & level diff
25> I want to do remote login how?
26> Use of NIS?
27> Use of Log files?
28> I sent a mail but lost how to find it where is ..?

Some other

- How to find which user surfed which site? squid not log file
- which command you use for maintaing system info to submit to your manager?
- How you reduce load on your server
- tools used to check system load and performance
- Do you know anything about DHCP on windows server
- Application that you much like can confident about that
- In sort what you know in Linux
- Can you compile C program in linux how?
- about Linux shell scripting any other scripting language you know

Another that some asked to me?
1> why i hire you?
2> what is mean and responsibilities of a sys admin
3> why you chose linux as career?
4> About your current job and responsibilities
5> After doing job in diff field near about 2 years why you want to move your path
6> Why Linux not Windows?  :)
7> What is your strenght?
8> Do you have any question?
9> Anything that you want to ask?
10> What is yor expection?
11> expected salary?
12> notice period how soon you can join?

Our HR department will inform you -- Why this?? :(

Some exact questions i don't remember so i just written in short!!!

1>  size of MBR, fields in MBR, PT size in MBR
2>  Dir /abcd have 744 perm to user but file /abcd/file1 has 777 permission can a normal
    user edit file1, if no why?
4>  what called #! /bin/bash
5>  There a parameter in vsftpd conf file without which vsftpd server will not work
6>  Diff GRUP & LILO techinical DIFF ...
7>  Can we authenticate only users login on vsftpd by LDAP how
8>  Port number SAMBA, DHCPD, SQUID, DNS, POP, POP, NTP on secure level, IMAP on secure level,
    sendmail on secure level, Postfix..
9>  Diff TCP/UDP
10> What are 7 Layers TCP/IP eg of each
11> Fields in DNS
12> USe of ip_farwording
13> where is config file of sshd service.
14> what is tunnel
15> What is mutt
16> fields in top command meanings
    1>load average 2> %id     3> Mem: 4> SWAP
17> What is the use of swap partition
18> can we encrease swap partition size how
19> syntax of for loop in bash
14> awk stand for
15> can we change vsftpd default directory location
16> Can we change Default Directory in apache
16> Can we use index.php insted of index.html as default page in apache how .
17> visudo command will open file?
18> Diff RHEL & Centos
19> Diff LILO GRUB
20> Advantages of GRUB
21> What is iptables, Firewall, netfilter ..?
22> write iptable to block use of sshd service via port 22 from outside of range
23> Tables in iptables
24> what is cluster & virtualizaton just basic, what you understand by term..
25> what is domain and hostname concept.
26> can a system have multiple hostname/domainname how?
27> how many virtual ips you can assign to a single interface.