This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
# Converts an integer number representing an IP back into an IP address string | |
use strict; | |
sub ip_to_int ($) | |
{ | |
my $addr = shift @_; | |
return unpack("N", pack("C4", split(/\./, $addr))); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
# Converts an IP address string to a single integer number | |
use strict; | |
sub ip_to_int ($) | |
{ | |
my $addr = shift @_; | |
return unpack("N", pack("C4", split(/\./, $addr))); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
# Without parameters, the script displays all the CIDRs and corresponding networks. | |
# The script will also demonstrate convering a netmask back into a CIDR, but it | |
# appears that conversion is broken and needs to be looked at. | |
# | |
# With parameters, if display network netmask, broadcast, etc info about each IP | |
# address provided on the command line. | |
# | |
# Ultimately, this script intends to demostrate reusable functions that can be |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
# Without parameters, the script displays the current date in three different | |
# formats (epoch, julian, and gregorian). Here is a example run: | |
# | |
# $ ./complicated_date.pl | |
# epoch: 1471012564 Fri Aug 12 10:36:04 2016 | |
# julian: 2457613.10837963 | |
# gregorian: 1471012564 Fri Aug 12 10:36:03 2016 | |
# |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#/bin/bash | |
# This script demonstrates how to create a queue of items to work | |
# from and then process X number of jobs in parallel, increasing | |
# speed and efficiency. Adjust MAX_JOBS according to how many | |
# items from the queue should be ran in parallel. This script | |
# preloads the queue with stuff from the home directory just as | |
# a demonstration. | |
### Keep track of the number of children processing queue items |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/bin/sh | |
# This script displays all the packages installed on a RedHat/CentOS system | |
# with additional information about installation time sorted by most recently | |
# installed packages first. This is useful when looking at what packages | |
# were recently updated. | |
# | |
# $ ./rpm_query.sh | head | |
# 1449154458 Thu 03 Dec 2015 02:54:18 PM UTC filesystem-3.2-20.el7.x86_64 | |
# 1449154458 Thu 03 Dec 2015 02:54:18 PM UTC libgcc-4.8.5-4.el7.x86_64 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
## This script listens for a UDP message on a port containing the text "hello". | |
## The listener will respond back to the client with its own "hello" string. | |
## Clients can send messages to this listener using netcat. The following works: | |
## echo hello | nc -4u -w1 <listener_hostname> <listener_port> | |
## Substitute the hostname and port for where this listener is running from. | |
## Keep in mind that ports less than 1024 will require the listener to run as root. | |
## | |
## The listener does not yet take any command line options. |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
## This script listens for UDP messages on a port and hexdumps them to the screen. | |
## The listener will not send any response back to the client. It receives only. | |
## Clients can send messages to this listener using netcat. The following works: | |
## echo hello | nc -4u -w1 <listener_hostname> <listener_port> | |
## Substitute the hostname and port for where this listener is running from. | |
## Keep in mind that ports less than 1024 will require the listener to run as root. | |
## | |
## The listener does not yet take any command line options. |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
### | |
## Working bash_profile file. | |
### | |
# MacPorts | |
export PATH=/opt/local/libexec/gnubin:/opt/local/bin:/opt/local/sbin:~/bin:$PATH | |
export MANPATH=/opt/local/share/man:$MANPATH | |
export PS1="[\u@\h \W]$ " | |
test $WINDOW && PS1="[\u@\h$$WINDOW \W]\$ " |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/perl -w | |
use strict; | |
### | |
## This demonstrates how you can include BEGIN and END blocks in | |
## a perl script, but they don't necessarily execute in the order | |
## that they appear in the script. Here is the output when run: | |
## | |
## $ ./begin_end_perl_test.pl |
OlderNewer