1. Shell Programming and Scripting

I'd like to make a script that I can execute every time I sign on to my linux box that keeps track of the time and allows to me to add a remark to a file. So basically once I log in, I run the script, and it outputs the date and time to a text file (log.txt). But that isn't my problem. I need... (1 Reply)

2. Shell Programming and Scripting

Logic of code if ( $var is a number ) { Do something } else { Do something else } My question is: How do I check if a variable is a number. All the reg ex that I came up with to match this is failing. Please help. (3 Replies)

3. Shell Programming and Scripting

Take a look at this code: #!/usr/bin/perl use 5.008; $_ = "somename@address.com"; if(/\@\w+\.com/) { print "\n\nmight be an email address\n\n"; } else { print "\n\nnot an email address\n\n"; } Shouldn't the /\@\w+\.com/ evaluate as true? I've also tried: ... (3 Replies)

4. UNIX for Dummies Questions & Answers

Ok so I am working on a command that is going to do a Dig @ a certain IP address which is enclosed in a variable. Now I thought I had this figure out because it works. The problem is that it does not ALWAYS work. the variable is IP=192.168.1.1 the commands I have tried are dig... (2 Replies)

5. Shell Programming and Scripting

I am working on a perl script that is used to update a list of hosts to a certain file but I am having an issue when I try to perform a check to make sure the user enters valid information. The following is what I have currently written for the script: IPINPUT: print "Enter IP Address: ";... (2 Replies)

6. Shell Programming and Scripting

Hi Experts, I am checking how to get day in Perl. If it is “Monday” I need to process…below is the pseudo code. Can you please prove the code for below condition. if (today=="Monday" ) { while (current_time LESS THAN 9:01 AM) ... (1 Reply)

7. Shell Programming and Scripting

HI I'm terribly new to perl .. I;ve been trying to use this command to search and replace entries in a file I tried this and it works perl -p -i -e 's/old/new/' filename Problem is that I have a list of email addresses and I need to serach and replace the entire email address as my... (5 Replies)

8. Shell Programming and Scripting

I have a script which is reading value from property file and doing replacement in source location which contains multiple files. property file has values abc=xyz; yux=1;version=3.0; bcd=123;apple==mango when my script does search and reads value from property file. its replacing value... (1 Reply)

9. Programming

My issue is that the perl script (as I have done it so far) created empty branches when I try to check some branches on existence. I am using multydimentional hashes: found it as the best way for information that I need to handle. Saing multidimentional I means hash of hashes ... So, I have ... (2 Replies)

10. Shell Programming and Scripting

Hello, Below script works fine when I manually enter required information for each file. When it comes to shell in auto mode, it gives various errors. I am under ubuntu 14.04 / trusty. manual_run.sh: #!/bin/bash /usr/bin/ffmpeg -start_at_zero -copyts -i nicki.mp4 -c:v mpeg2video \ -b:v 500k... (3 Replies)