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Top Forums Shell Programming and Scripting Help with Shell Script to View Logs Post 303001262 by Ricky777 on Tuesday 1st of August 2017 01:45:24 AM
Old 08-01-2017
Help with Shell Script to View Logs

Hi

I'm very new to unix shell scripting. Im also new here in this forum. I'm a SQL Server DBA but I'm slowly learning Oracle and Sybase DB. Our Oracle and Sybase are on Unix platforms. Im slowly learning Linux Admin and Shell Scripting to automate tasks.

I'm writing a script to view DB error logs. I'd like my script to ask me how many lines from the logs do I want to read and if I want to grep a word.

I use the if..else construct. the command after the "if" is working but after the "else", if blank, I just want my script to ignore the "grep"

Code:
## script
echo "Enter number of lines to view:"
read lines
echo "grep a word?"
read word
if [ word=$word ]
then
   tail -$lines /soft/prd/logs/sybase/SGPRD1_SQL.log | grep $word
else
   tail -$lines /soft/prd/logs/sybase/SGPRD1_SQL.log
fi


--Error:
Code:
grep a word?

Usage: grep -hblcnsviw pattern file . . .

Moderator's Comments:
Mod Comment Please use CODE tags when displaying sample input, output, and code segments.

Last edited by Don Cragun; 08-01-2017 at 03:52 AM..
 

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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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