Sponsored Content
Top Forums Shell Programming and Scripting Perl - immitate perpetual "tail" Post 302133251 by jjinno on Wednesday 22nd of August 2007 01:54:25 PM
Old 08-22-2007
From what I can see, there is no such thing as "popen tail" in Perl...

I mean I can backtick or qx the actual command that writes the log in the first place, but that would give me the whole log in a Perl variable, and all I care about is one line at a time - the last line.
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

script not working after "tail -f"

Hi Everyone , I am facing a strange problem i have made the follwing script to watch a appending log file (abc.log) but its not moving after the line tail -f , any suggestions ===================================== #!/bin/bash while true do tail -f abc.log | grep "exceptions" echo hi... (12 Replies)
Discussion started by: xander
12 Replies

2. UNIX for Dummies Questions & Answers

Explain the line "mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'`"

Hi Friends, Can any of you explain me about the below line of code? mn_code=`env|grep "..mn"|awk -F"=" '{print $2}'` Im not able to understand, what exactly it is doing :confused: Any help would be useful for me. Lokesha (4 Replies)
Discussion started by: Lokesha
4 Replies

3. Shell Programming and Scripting

perl folder list with "..", without ".".

Hi Everyone, if my folder "foldera" inside has one file. so if i do if ($df =~ /^\./) { next; } then i will get ### filea ### if i want to have ### .. filea ### means also display the parent .., how should i modify the perl ~// in my code? Thanks ---------- Post updated... (6 Replies)
Discussion started by: jimmy_y
6 Replies

4. Shell Programming and Scripting

awk command to replace ";" with "|" and ""|" at diferent places in line of file

Hi, I have line in input file as below: 3G_CENTRAL;INDONESIA_(M)_TELKOMSEL;SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL My expected output for line in the file must be : "1-Radon1-cMOC_deg"|"LDIndex"|"3G_CENTRAL|INDONESIA_(M)_TELKOMSEL"|LAST|"SPECIAL_WORLD_GRP_7_FA_2_TELKOMSEL" Can someone... (7 Replies)
Discussion started by: shis100
7 Replies

5. UNIX for Dummies Questions & Answers

"tail -n 1 filename" error while "head -n 1 filename" is ok?

Hi all, I was wondering why tail -n 2 filename produce an error when I manage to do similar command on head -n 2 filename SunOS{type8code0}: tail -n 2 filename usage: tail ] tail ] (2 Replies)
Discussion started by: type8code0
2 Replies

6. Shell Programming and Scripting

Perl failure with "main::$fn" used only once:" in error logs

Hi all, Can anyone guess why this is happening? I am new to Perl, so please help me to fix this error: - I have a static html file which calls the cgi-perl script. HTML Code: <html> <head> <title> Hey Dude! </title> </head> <body> <form method="POST"... (3 Replies)
Discussion started by: bashily
3 Replies

7. UNIX for Dummies Questions & Answers

Using "mailx" command to read "to" and "cc" email addreses from input file

How to use "mailx" command to do e-mail reading the input file containing email address, where column 1 has name and column 2 containing “To” e-mail address and column 3 contains “cc” e-mail address to include with same email. Sample input file, email.txt Below is an sample code where... (2 Replies)
Discussion started by: asjaiswal
2 Replies

8. Shell Programming and Scripting

Bash script - Print an ascii file using specific font "Latin Modern Mono 12" "regular" "9"

Hello. System : opensuse leap 42.3 I have a bash script that build a text file. I would like the last command doing : print_cmd -o page-left=43 -o page-right=22 -o page-top=28 -o page-bottom=43 -o font=LatinModernMono12:regular:9 some_file.txt where : print_cmd ::= some printing... (1 Reply)
Discussion started by: jcdole
1 Replies

9. AIX

Apache 2.4 directory cannot display "Last modified" "Size" "Description"

Hi 2 all, i have had AIX 7.2 :/# /usr/IBMAHS/bin/apachectl -v Server version: Apache/2.4.12 (Unix) Server built: May 25 2015 04:58:27 :/#:/# /usr/IBMAHS/bin/apachectl -M Loaded Modules: core_module (static) so_module (static) http_module (static) mpm_worker_module (static) ... (3 Replies)
Discussion started by: penchev
3 Replies
All times are GMT -4. The time now is 08:45 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy