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Full Discussion: Cd to another directory to view a log file
Top Forums Shell Programming and Scripting Cd to another directory to view a log file Post 303024862 by simpsa27 on Thursday 18th of October 2018 09:20:48 AM
Old 10-18-2018
Cd to another directory to view a log file
Hi guys

Today I have been working on a script to execute to view entries within a log file.

I have successfully got the command I want to execute within the script itself. I want to view the last 5 entries within a log file and see just the last numbers. The file name would change depending on the date.

Code:
sort -rn $(ls -c localhost_access_log.*.txt | head -n 1) | sed -r '/HTTP\/1\.1" [0-9]+ [0-9]+ [0-9]$/d' | head -n 5 | grep POST | sed -e 's|^.*\s\(.*\)$|\1|'

Returns what I expect to see

Code:
2347
2433
2374
2328
2287

However I want to execute this within a shell script and the file is located within a different location to the log file.

I tried to setup an alias within the shell script but that hasn't worked so I am not 100% sure how to do this.

Code:
logfile=`cd '/opt/product/apachetomcat/8080/8.5.5_8080/apache-tomcat-8.5.5/logs'`

$logfile

last_install=`sort -rn $(ls -c localhost_access_log.*.txt | head -n 1) | sed -r '/HTTP\/1\.1" [0-9]+ [0-9]+ [0-9]$/d' | head -n 5 | grep POST | sed -e 's|^.*\s\(.*\)$|\1|'`

echo $last_install

exit 0

Any help would be much appreciated.

The log file location: /opt/product/apachetomcat/8080/8.5.5_8080/apache-tomcat-8.5.5/logs

Thanks in advance
 

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LEARN ABOUT OSF1

log

log(8)							      System Manager's Manual							    log(8)

NAME

       log - Records input and output from a program

SYNOPSIS

       /usr/sbin/log <logfile> <command>

OPERANDS

       The file in which to record the interaction being logged.  The command to execute.

DESCRIPTION

       The  log  program  runs <command> and logs the input to and output from <command> to the <logfile> file.  Input and output are logged until
       <command> exits, the log program exits, and the exit status of <command> is returned.

       The log program is used by the system  installation  procedure  and  the  it(8)	command  to  create  the  /var/adm/smlogs/install.log  and
       /var/adm/smlogs/it.log installation log files.

RESTRICTIONS

       Because	the  log  program is used in the installation standalone environment, program size was the greatest concern in its implementation.
       The log program does not search for the PATH variable to locate <command> and error messages are terse.

       The log program causes <command> to take standard input from and write standard output and standard error to  UNIX  pipes.   Some  commands
       will  not  be able to operate in this environment; therefore, it is suggested that you use the script(1) command instead.  UNIX shells will
       not issue prompts when run from log unless the shell is started with an explicit interactive switch (-i for most shells).  For example, log
       foo.tmp /sbin/sh -i

       In the previous example, foo.tmp is the name of <logfile>.

       The  log  program  intercepts  end-of-file (usually Ctrl/d).  Therefore programs which normally receive end-of-file as an exit command must
       exit by some other means.

ERRORS

       Log open error

   Explanation:
       The log program was unable to open <logfile>. Verify that the directory exists and that ownerships and permissions are set correctly.

       Exec Error

   Explanation:
       The log program was unable to execute <command>. Verify that you specified a full pathname for <command> and  that  <command>  is  an  exe-
       cutable file.

       Fork Error

   Explanation:
       The log program was unable to create one of the processes it requires to log data.

SEE ALSO

       Commands: it(8), script(1)

																	    log(8)
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