Script to check logs Post: 302707769

Sponsored Content

Top Forums Shell Programming and Scripting Script to check logs Post 302707769 by nextyoyoma on Sunday 30th of September 2012 12:28:04 AM

09-30-2012

Registered User

You need to quote "$SearchString1" to prevent word splitting when the variable is expanded. Think of it this way: if you typed in "grep Sep 29" it would think you were trying to look for the string "Sep" in the file "29." So when the shell expands $SearchString1, it is as if you had typed in "grep Sep 29" without any quotes. By quoting, you prevent the shell from splitting the argument into two words.

EDIT: There are a number of other problems, or at least inefficiencies in your script, but as a novice scripter myself, I understand that sometimes you just struggle through it to get the job done. Some things to consider:

1) Consider whitespace when writing scripts. Your script with meaningful whitespace:

Code:

#!/bin/ksh
# Start of main processing

echo "enter String One";
read SearchString1
echo "Enter String two";
read SearchString2
echo "$SearchString1"
for i in `cat ~/Desktop/Loginput`;
	do
		if [ "$SearchString2" == '' ]
			then
				cat $i|grep "$SearchString1" >>"Logoutput"
			else
				cat $i|grep "$SearchString1"|grep $SearchString2 >>"Logoutput"
		fi
	done
exit 0

I did move the "then" statement to its own line. While the whitespace means nothing to the shell, it makes it much easier for humans to read because you can see the organizational structure of your script.

2) ";" is not needed at the end of a line. The shell interprets a newline as the end of a command, unless it is quoted, in which case it is taken literally (example below):

Code:

echo "
"

3) It looks like you are testing whether the second search string is blank. An easier way to do this is simply [[ "$SearchString2" ]]. If the string is null, the test will return false, and the if command will execute the "else" portion of the construct.

Last edited by nextyoyoma; 09-30-2012 at 01:47 AM..

nextyoyoma

View Public Profile for nextyoyoma

Find all posts by nextyoyoma

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

is it possible to check logs in UNIX who deleted the files?

Hello, is it possible to check logs in UNIX who deleted the files? Is there logs in UNIX besides .sh_history?

2. Shell Programming and Scripting

How to check whether logs are updating or not?

how to check whether logs are updating or not in unix is there any built in command or function ?

3. Solaris

logs to check

Hi all i want to know what are the logs we need to check when the server is down and how to resolve to make server UP? please help me with this

4. Solaris

archive logs mount point space check script

I have the below shell script which is checking /archlog mount point space on cappire(solaris 10) server. When the space usage is above 80% it should e-mail. When i tested this script it is working as expected. -------------------------------------------------------------------------...

5. UNIX for Dummies Questions & Answers

Check for updation/error/stuck of logs

Hi All, I'm a newbie in Linux Programming.:) Got some 500 processes running and I have around 20-30 logs updating for every 2mins on a server. The logs which i'm referring usually contains book name,run ids(not PID's),process name etc etc. I'm interested in finding out whether some particular...

6. Shell Programming and Scripting

Need to check logs

I have nearly 25+ tail commands which we need to verify the logs if there is any errors on current or previous date with time. I need this to be automate and send email to me with details. Please help me on this.

7. Shell Programming and Scripting

Any utility or tool to check logs

HI, In our project daily we need to check for some errors in around 45-50 folders. Please let me know if there is any utility tool using which 1 can check each folder and file for error. Use: Monday we are checking if there were any error in files generated on Monday Tuesday to Wednesday we...

8. Shell Programming and Scripting

Script to check response time from nginx logs

Hi, My goal is to monitor the response time from the access logs of nginx server. I am using gawk to print the needed fields - 'response time' and 'name of the service' from nginx logs. Command: gawk '($6 ~ /cloudservice/) {print $10, $6}' access.log Output: 0.645 /nc/cloudservice...

9. Shell Programming and Scripting

To check if a file is open and in use (logs are being written to it)

Hello Experts, I need to write a shell script to check if a file is open and something is being written to it. I want to know how OS handles it. I checked with lsof command but it is not working. For a test I did this. while true; do echo `date` >>abc.txt; done then I checked lsof |...

10. Shell Programming and Scripting

If I ran perl script again,old logs should move with today date and new logs should generate.

Appreciate help for the below issue. Im using below code.....I dont want to attach the logs when I ran the perl twice...I just want to take backup with today date and generate new logs...What I need to do for the below scirpt.............. 1)if logs exist it should move the logs with extention...

LEARN ABOUT ULTRIX

qmail-pw2u

qmail-pw2u(8)                                                 System Manager's Manual                                                qmail-pw2u(8)

NAME

       qmail-pw2u - build address assignments from a passwd file

SYNOPSIS

       qmail-pw2u [ -/ohHuUC ] [ -cchar ]

DESCRIPTION

       qmail-pw2u reads a V7-format passwd file from standard input and prints a qmail-users-format assignment file.

       A V7-format passwd file is a series of lines.  Each line has the format

          user:password:uid:gid:gecos:home:shell

       where  user  is an account name, uid and gid are the user id and group id of that account, and home is the account's home directory.  pass-
       word, gecos, and shell are ignored by qmail-pw2u.

       If you put the output of qmail-pw2u into /var/lib/qmail/users/assign, and then run  qmail-newu,  qmail-lspawn  will  obey  the  assignments
       printed by qmail-pw2u.  WARNING: After changing any users, uids, gids, or home directories in your passwd file, you must run qmail-pw2u and
       qmail-newu again if you want qmail-lspawn to see the changes.

RULES

       By default, qmail-pw2u follows the same rules as qmail-getpw.  It skips user if (1) uid is zero, (2) home does not exist, (3) user does not
       own  home, or (4) user contains uppercase letters.  It then gives each remaining user control over the basic user address and all addresses
       of the form user-anything.  A catch-all user, alias, controls all other addresses.

       You may change these rules by setting up files in /var/lib/qmail/users:

       include
              Allowed users, one per line.  If include exists, and user is not listed in include, user is ignored.

       exclude
              Ignored users, one per line.  If exclude exists, and user is listed in exclude, user is ignored.

       mailnames
              Replacement names for users.  Each line has the form

                 user:mailname1:mailname2:...

              The addresses mailname1 and mailname1-ext and mailname2 and so on will be delivered to user.

              WARNING: The addresses user and user-ext will not be delivered to user unless user is listed as one of the mailnames.

              A line in mailnames is silently ignored if the user does not exist.

       subusers
              Extra addresses.  Each line has the form

                 sub:user:pre:

              sub will be handled by home/.qmail-pre, where home is user's home directory; sub-ext will be handled by home/.qmail-pre-ext.

       append Extra assignments, printed at the end of qmail-pw2u's output.

OPTIONS

       -o     (Default.)  Skip user if home does not exist (or is not visible to qmail-pw2u).  Skip user if home is not owned by user.

       -h     Stop if home does not exist.  This is appropriate if every user is supposed to have a home directory.  Skip  user  if  home  is  not
              owned by user.

       -H     Do not check the existence or ownership of home.

       -U     (Default.)  Skip user if there are any uppercase letters in user.

       -u     Allow uppercase letters in user.

       -cchar Use char as the user-extension delimiter in place of -.

       -C     Disable the user-extension mechanism.

       -/     Use home/.qmail-/...  instead of home/.qmail-...

SEE ALSO

       qmail-users(5), qmail-lspawn(8), qmail-newu(8), qmail-getpw(8)

                                                                                                                                     qmail-pw2u(8)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

is it possible to check logs in UNIX who deleted the files?

Discussion started by: james_falco

2. Shell Programming and Scripting

How to check whether logs are updating or not?

Discussion started by: mail2sant

3. Solaris

logs to check

Discussion started by: vkav

4. Solaris

archive logs mount point space check script

Discussion started by: dreams5617