How will you find which operating system your system isrunning on in UNIX?
"uname" -a
How do you find which process is taking how much CPU?
"top" command.
How do you check how much space left in current drive ?
"df" command
For example"df -h ." will list how full your current drive is.
How do you check if a particular process is listening on aparticular port on remote host?
"telnet" command .
Example “telnethostname port”, if it able to successfully connect then some process islistening on that port. To read more about telnet read networking command inUNIX
How do you find whether your system is 32 bit or 64 bit ?
Either by using "uname -a" command or by using"arch" command.
How do you find for how many days your Server is up?
"uptime" command
What are the diffrent flavours avilable in Unix?
Linux .. Red Hat Linux ... Solaris ... HPUX...IBM and AIX
How do you find which remote hosts are connecting to yourhost on a particular port say 10123?
"netstat" command
execute netstat -a | grep"port" and it will list the entire host which is connected to thishost on port 10123.
How to find the port is used or free ?
netstat -an | grep :687
How do you see command line history in UNIX?
Very useful indeed, use history command along with grepcommand in unix to find any relevant command you have already executed. Purposeof this Unix Command Interview Questions is probably to check how familiarcandidate is from available tools in UNIX operation system.
How do you know if a remote host is alive or not?
You can check these by using either ping or telnet commandin UNIX. This question is most asked in various Unix command Interview becauseits most basic networking test anybody wants to do it.
what is the command used to run the process in backgroud ?
&
what is the useof zip command?
this is used to 'zip' the directories or folder forthisinput file is 'tarfile'.syntax: gzip director.tar ex: gzip abc.tar 19
How do you schedule a jobs ?
'crontab' command
is a scheduler which is used to schedule any job at anytime around the year.syntax: crontab -l (listing the scheduler)ex:crontab -e(to edit and modify any changes in the scheduer
If i want to change the permission . what is the command i need to use?
Chmod a+rwx filename
If i want to copy a file what is the command i need to use?
cp fie1 file2
If i want to search a file from a folder what is the commandi need to use?
ls dirname/filename
If i want to read last 200 line from a file what is thecommand i need to use?
tail -200f filename
If i want to edit a file How can you do it ?
vi <<filename>>
How do you check an Application name"mobilepayment" is up and running ?
ps -ef | grep "mobilepayment"
How do you stop the runningprocess ?
firstyou need to get the PID by using ps -ef |grep "mobilepayment" then use
kill PID
kill-9 PID
How do you check the virtual memory statistics of your CPU ?
vmstat reports information about processes, memory, paging, block IO, traps, and cpu activity.
The first report produced gives averages since the last reboot. Addi- tional reports give information on a sampling period of length delay. The process and memory reports are instantaneous in either case.
Hi Kusam Commands Are really helpful Thanks
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