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What are the different process states?
russpark
- Sep 29th, 2010
This varies by individual Operating System Vendor (AIX, HPUX, etc...) -here's what the man page for the ps command in hpux 11i v1 says: &...
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Write a shell script to list only the hidden files in the current directories? What is the o/p of following command $a =*, echo $a, echo "$a"? Which of the following is allowed in an arithmetic involving expr instruction. [],{},()? If values "hi", "Hello","Bye","Good Bye" are supplied to the following statement what will be the o/p read n1,n2 , echo $n1 $n2? How do you know that how many commands can be stored in the buffer in one session?
Markerhell
- Aug 26th, 2009
1. ls > a.txt | ls -a > b.txt | diff a.txt b.txt 2. echo $a will print the list of all the files in the directory in row manner. echo "$a" will print * on t...
raj
- May 17th, 2007
You can get them by just giving ls -ax | head -2
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How to terminate a process which is running and the specialty on command kill 0?
With the help of kill command we can terminate the process.Syntax: kill pidKill 0 - kills all processes in your system except the login shell.
satyam.kumar2008
- Aug 9th, 2008
Kill -0 : All processes in the current process group are signaled. Kill -0 commnd is use to sends signal to all process and group of process.
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Write command to delete all the files from a directory which have been created after a specified time.
cmanne
- Sep 2nd, 2009
find -name "*.dmp" -mtime +180 -exec rm -f {} ; The above one liner will delete the files after searching for the coredump files under the specified directory path which are older than 180 days.
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How to import and export the data from databse using shell script
Markerhell
- Aug 26th, 2009
To import the data:
mysqldump -u username -p databasename >> databasenamedump.sql
To Export the data:
mysql -u username -p newdatabasename < databasenamedump.sql
anuraggupta81
- Sep 18th, 2007
Following command will be used for import from shell scriptimp [DBA User/DBA Password] FILE= [File Name] FROMUSER=[User from which the dump is taken] TOUSER=i[user to which the dump will be imported]&...
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How do you get current CPU utilization, memory and disk space usage in Linux/Unix?
What are the commands?
karkhile_rahul
- Jun 5th, 2009
We can find the CPU utilization by using topas command.and memory utilization by svmon command
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Proxy Server IP
Command to find the IP of an Proxy Server in UNIX
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Connect Remote Terminals
What is the command to connect to remote terminals?
Suresh
- May 24th, 2019
#ssh username@servername
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What is redirection?
Directing the flow of data to the file or from the file for input or output.Example : ls > wc
satyam.kumar2008
- Aug 9th, 2008
Whenever we run a command on shell prompt we get some output on shell prompt.In case we don't want to appear the output on the shell prompt we can redirect the output to the somewhere else. We can mak...
wow_suraj
- May 7th, 2008
redirection is used to change the default input and output source.'>' is used to redirect the output to location other than standard output terminal. If the location doesn't exist it wi...
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What are shell variables?
Shell variables are special variables, a name-value pair created and maintained by the shell. Example: PATH, HOME, MAIL and TERM
rupesh kumar
- Dec 17th, 2013
Shell variables are special variables, a name-value pair created and maintained by the shell. Example: PATH, HOME, MAIL
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What is the command to list files from directory in decreasing order of their file size.
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What does command "kill -9" does ?
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How to copy a file from Remote AIX server to my local windows desktop
I am logging to remote AIX server, i want to copy a file from that server to local windows desktop. How can i do this?
tonan
- Jul 3rd, 2009
Usually you can ftp to transfer files from one system to another, but ftp uses plain text passwords, therefore you can use scp ( secured copy protocol)unix/linux its inbuilt : scpwindows : pscpso from...
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Extracting File Name
How can you extract just the Filename from the Fully Qualified Path and Filename.Basename?
jincee
- Aug 10th, 2009
file1=`basename $0`echo "$file1"(or)file1=`basename /home/user1/Jincy/base.ksh`echo $file1 The above commands will give the outpuy as base.ksh if you just need the base of the file...
arunkumj
- Jan 15th, 2009
Cat will give the full content of a file in one go.more will give the content of the file in page by page
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UNIX Command to Store Data
You have to store data on the system which command will you use(a) fread(b) fwrite(c) read(d) write
Jerry Gallagher
- Jan 4th, 2014
The header to this question is wrong. This is not a unix command it should be titled "C library function to store data in a file".
The answer would then be (a) fwrite.
fwrite is not operating system specific and will work the same on Unix or Windows.
hanumant
- Jul 18th, 2013
(d) write
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Searching for file in UNIX
How to search a file in a directory having sub directories having size more than 10MB?
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Extracting Characters and Mathematical Computation
I have a file with 1 record only and i.e. "Ashish|Bhasin|30000|END", I want to extract the first three characters of the third column and divide it by 10, so in the above case the answer should be 30.
I am using cut command to get 30000 out but not being able to use it further to divide it by 10.
Any bits? -
What is a pipe and give an example?
A pipe is two or more commands separated by pipe char '|'. That tells the shell to arrange for the output of the preceding command to be passed as input to the following command. Example : ls -l | prThe output for a command ls is the standard input of pr. When a sequence of commands are combined using pipe, then it is called pipeline.
satyam.kumar2008
- Aug 9th, 2008
The Unix commands alone are powerful, but when two or more commands get combine together, we can accomplish complex task with ease.In unix we can combine the two or more commands together to perform m...
wow_suraj
- May 7th, 2008
Pipe '|' is used to combine two or more commands to be executed at the sameinstance.Pipe redirects output of the first command (before '|') as input to the second comman...
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What difference between cmp and diff commands?
cmp - Compares two files byte by byte and displays the first mismatchdiff - tells the changes to be made to make the files identical
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What is the difference between > and >> redirection operators ?
Is the output redirection operator when used it overwrites while >> operator appends into the file.
UNIX Interview Questions
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