number of instance check Post: 302718483

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Check if variable is a number

If I have a variable $X, how do I check it is a number? Many thanks.

2. Shell Programming and Scripting

How to check if another instance of the process is running

Hi, I am writing a shell script to invoke a C++ program. Before I start the C++ program (oi7loadbalancer), I am checking if the process is already running. I start the process only if it is not already running. I have the following check in my script. proccount=`ps -f -u $USER_NAME | grep...

3. Shell Programming and Scripting

replace first instance(not first instance in line)

Alright, I think I know what I am doing with sed(which probably means I don't). But I cant figure out how to replace just the first occurance of a string. I have tried sed, ed, and grep but can't seem to figure it out. If you have any suggestions I am open to anything!

4. Shell Programming and Scripting

How to check whether a string is number or not

Hi , I am facing a problem .. which looks simple... but took 2 days of mine.. even now it is not solved completely.. I have one variable..., want to know whether that variable contains number... canbe +ve or -ve ... Values +35 --- number -43 --- number 45A -- non number...

5. Shell Programming and Scripting

check number of character

hi, I would like to calculate number of character for a number, for exemple : 1200 --> there are 4 characters , 120001 -> 5 characters

6. Shell Programming and Scripting

To check a word is number or not

Hi, I have one file like 00123. And this file name is generated as a sequence. So how can I confirm the generated file name is a number, not a special character or alphabets. Can anybody help me out. Thanks in advance.

7. Shell Programming and Scripting

Check if the value is Number

Hi, I have a file with data as given $cat file1.txt 123 234 23e 234.456 234.876e 345.00 I am checking if the values are proper integers using the command. nawk -F'|' 'int($1)!=$1 {printf "Error in field 1|"$0"\n"}' file1.txt This is checking for only integers ( without...

8. UNIX for Dummies Questions & Answers

Maximum Number of Virtual Hosts per Apache instance

Is there a directive to limit the number of virtual hosts allowed per apache instance? I am told yes but I cannot find it.

9. UNIX for Dummies Questions & Answers

How to check if a number exists?

Hello, May i please know how do i check if the given input argument is one of the listed numbers then success else failure. I am using bash shell. if then echo "success" else echo "failure" fi Thank you.

10. UNIX for Advanced & Expert Users

How to check a single process instance is always running?

Hi, I want to write one program in C in Unix OS which will check the running status of a process time to time. If the process is stopped somehow by any means, it will ensure that the process is restarted and only one copy of the process image should run in memory at any point of time for the user....

LEARN ABOUT PLAN9

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Check if variable is a number

Discussion started by: handak9

2. Shell Programming and Scripting

How to check if another instance of the process is running

Discussion started by: sim

3. Shell Programming and Scripting

replace first instance(not first instance in line)

Discussion started by: IronHorse7

4. Shell Programming and Scripting

How to check whether a string is number or not

Discussion started by: shihabvk