nitinsatish

#!/bin/bash
#script to upgrade Apache web server
/usr/local/apache2/bin/httpd -v
echo "Upgrade apache ? [y/n]"
read ans
if [ "$ans" = "y" ]
then
echo -e "\n Backing up Apache dir \n"
cp -pr /usr/local/apache2 /usr/local/apache2-`date +%F`.bk
	tar -zxvf httpd-2.2.*.tar.gz

nitinsatish

#!/usr/bin/python
import sys
def getopt(args):
  if len(args)>1:
    opts={}
    while (args):
        if args[0][0]=='-':
             opts[args[0]]=args[1]
             args=args[2:]
        else:

nitinsatish

awk 'BEGIN { RS="}"  } { for(i=1;i<=NF;i++)  if ($i~"192.168") print $2,$i }' /etc/dhcpd.conf|sed 's/;//g'|sort -n -t. -k4

nitinsatish

#!/bin/bash
echo "Installing nagios-plugin"
cd nagios-plugins*
./configure --with-openssl=/usr/bin --with-mysql=/usr
make
make install
useradd nagios -G script
chown nagios.nagios /usr/local/nagios
chown -R nagios.nagios /usr/local/nagios/libexec

nitinsatish

#!/usr/bin/python
import os, sys

if len(sys.argv)==1 :
    folder='.'
else :
    folder=sys.argv[1]


if len(sys.argv)==3 :

nitinsatish

#!/usr/bin/python
import re
config_file='/etc/dhcpd.conf'
ips_used=[]
not_used=[]
try :
    dhcp_config=open(config_file,'r')

    for lin in dhcp_config :
        match=re.search(r'^fixed-address\ \d+\.\d+\.\d+\.(\d+);',lin) 

nitinsatish

Splunk error: Error 400 on SERVER: comparison of String with Float failed

• Check and correct the redhat release

rm -f /etc/redhat-release
ln -s /etc/centos-release /etc/redhat-release

• Check node defination matches hostname
• Check facter hostname correct

nitinsatish

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

nitinsatish

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

nitinsatish

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?