liyang85

#! /usr/bin/env python2
# -*- coding: utf-8 -*-

"""
Python Script to download the Chrome Extensions (CRX) file directly from the Google Chrome Web Store.
Referred from http://chrome-extension-downloader.com/how-does-it-work.php
"""

from __future__ import division
import argparse

liyang85

#!/usr/bin/env bash
#
# Usage: python-build [-kpv] <definition> <prefix>
#        python-build --definitions
#        python-build --version
#
#   -k/--keep        Do not remove source tree after installation
#   -p/--patch       Apply a patch from stdin before building
#   -v/--verbose     Verbose mode: print compilation status to stdout
#   -4/--ipv4        Resolve names to IPv4 addresses only

liyang85

https://githowto.com/

liyang85

#!/bin/bash
#
#===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== 
# Filename:		set_env_after_centos_mini_install_by_liyang.sh
# Description:
# Date:			2018-01-07
# Author:		Li Yang
# Website:		https://liyang85.com
#===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== 

liyang85

#!/bin/bash
# vim: set fdm=marker:
#
#===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====
# Filename:		auto_compile_lamp_by_liyang.sh
# Description:
# Date:			2018-02-14
# Author:		Li Yang
# Website:		https://liyang85.com
#===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====

liyang85

#!/bin/bash
#
# httpd        Startup script for the Apache HTTP Server
#
# chkconfig: - 85 15
# description: The Apache HTTP Server is an efficient and extensible  \
#	       server implementing the current HTTP standards.
# processname: httpd
# config: /app/httpd22/conf
# config: /etc/sysconfig/httpd

liyang85

yum -y install ncurses-devel
./configure
make && make install
install -m 644 etc/etcscreenrc /etc/screenrc

liyang85

# find the target file in the package
rpm2cpio httpd-2.2.15-59.el6.centos.x86_64.rpm | cpio -tv | grep "init.d/httpd"

# view content of the target file then redirect it
rpm2cpio httpd-2.2.15-59.el6.centos.x86_64.rpm | cpio -i --to-stdout ./etc/rc.d/init.d/httpd > /etc/rc.d/init.d/httpd

liyang85

#!/bin/bash

read name    
while [[ ! "$name" =~ '[A-Za-z ]' ]]; do
    read -p "Wrong name format. Re-enter: " name
done

name="${name// /_}"

read ip

liyang85

To belabor the obvious: IP addresses are 32 bit values written as four numbers (the individual bytes of the IP address) separated by dots (periods). Each of the four numbers has a valid range of 0 to 255.

The following bash script contains a bash function which returns true if it is passed a valid IP address and false otherwise. In bash speak true means it exits with a zero status, anything else is false. The status of a command/function is stored in the bash variable "$?".

#!/bin/bash

# Test an IP address for validity:
# Usage:
#      valid_ip IP_ADDRESS