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Full Discussion: how can i check in csh if command found or not found ?
Top Forums Shell Programming and Scripting how can i check in csh if command found or not found ? Post 302108232 by umen on Sunday 25th of February 2007 05:42:24 AM
Old 02-25-2007
how can i check in csh if command found or not found ?
hello all

im trying to use in sun Solaris the information received from the top command

now i several machines that dont have install the top program so when im running the script im geting error

saying after im running this code :

Code:
set MemoryInfo = `top | grep Memory`
      if ( $status != 1 ) then
        echo $MemoryInfo
      endif


top: Command not found

how can i prevent the printing of any error coming from executing unix application with tcsh ?
 

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LEARN ABOUT LINUX

zegrep

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)
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