How to add launchpad ubuntu repository and install php5-memcached 2.2.0

Add repository

# add-apt-repository ppa:ondrej/php5

Check available versions

# apt-get update

# apt-cache policy php5-memcached

Install memcashed
# apt-get install php5-memcached

VARNISH WEB INTERFACE FOR ADMIN AND CACHE INVALIDATION

1) Download and extract

wget https://github.com/varnish/vagent2/archive/master.zip
unzip master.zip
2)Install

cd vagent2-master/
./configure
make
make install
3)Protect the interface

nano /etc/varnish/agent_secret
Insert formatted

user:password
4)Start the agent

/usr/local/bin/varnish-agent
5)Varnish Web Interfase access (when promted for login , enter the user:password from /etc/varnish/agent_secret)

http://THE-SERVER-IP:6085/html/

6) The Varnish Web Interfase allow:
stop/start varnish
Cache invalidation
Set Parameters
View varnish performance

mail server Black list removal forms

Black list removal forms:
Barracuda
http://www.barracudacentral.org/rbl/removal-request/
SpamCop
https://www.spamcop.net/w3m?action=checkblock&ip=SERVER_IP
Blocklist Removal Center
http://www.spamhaus.org/query/ip/SERVER_IP
lashback delist
http://blacklist.lashback.com/delist
ivmSIP
http://dnsbl.invaluement.com/lookup/
CBL
http://cbl.abuseat.org/lookup.cgi?ip=xx.xxx.xxx.

/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- redis (LoadError)

/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- redis (LoadError)
solution:
gem 'redis', '~> 3.1.0'

How to add custom sensor for PRTG monitor (Linux)

Let say You have some custom script on Linux You want to monitor in PRTG

Main, monitor Redis Keys.

nano /etc/snmp/snmpd.conf

Add the script as following to end of the file:

extend redis_keys /path/to/script.sh

Restart snmpd

/etc/init.d/snmpd restart

Now , we need to find the OID value for our script:

snmptranslate -On NET-SNMP-EXTEND-MIB::nsExtendOutputFull.\"scriptname\"

some times , you need to add mib library to get OID values:

apt-get install snmp-mibs-downloader

In my case , script name is “redis_keys” , so it look like:

snmptranslate -On NET-SNMP-EXTEND-MIB::nsExtendOutputFull.\"redis_keys\"

.1.3.6.1.4.1.8072.1.3.2.3.1.2.10.114.101.100.105.115.95.107.101.121.115

The output is our OID for PRTG:

.1.3.6.1.4.1.8072.1.3.2.3.1.2.10.114.101.100.105.115.95.107.101.121.115

Before deal with PRTG , I want to be sure , my script working and return value:

snmpwalk -v 2c -c [Community String] localhost .1.3.6.1.4.1.8072.1.3.2

 iso.3.6.1.4.1.8072.1.3.2.4.1.2.10.114.101.100.105.115.95.107.101.121.115= STRING: "/ssd/home/adika/monitor/keys" 

Where [Community String] is You PRTG Community String

Now In PRTG:

Choice CUSTOM

Add our OID

Linux find files between dates

touch -t 201409070120.01 first (yyyymmdd-hour)

touch -t 201409080120.01 last (yyyymmdd-hour)

find perl files between date range:

find . -type f -name '*.pl' -newer /root/first ! -newer /root/last -exec ls -s {} \;

remove files with specific extension

find .  \( -name "*.php" -o -name "*.html" -o -iname "*.htm" \) -exec ls -s  {} \; -print -exec rm {} \;

remove files with specific extension and contains some expression:

find .  \( -name "*.php" -o -name "*.html" -o -iname "*.htm" \)  -exec grep -l "some expression"  {} \; -print -exec rm {} \;

find  files and directories between date range:

find .  -type d \( -name cache -o -name logs -o -name stats -o -name webalizer \) -prune -o \( -name "*.php" -o -name "*.html" -o -iname "*.htm" \) -newer /root/first ! -newer /root/last -print

alternative telnet send mail test

Instead of send a test mail using Telnet , simple
echo -e "To: mail@domain.com\nSubject: Test\nTest\n" | sendmail -bm -t -v