PSJoshi’s gists

PSJoshi / sysctl.conf

Last active June 3, 2024 16:12

linux kernel tunning - sysctl.conf

	# Configuration file for runtime kernel parameters.
	# See sysctl.conf(5) for more information.

	# See also http://www.nateware.com/linux-network-tuning-for-2013.html for
	# references:
	#
	# https://config.securix.org/config/securix-conf/etc/sysctl.conf
	# https://github.com/minhdanh/Linux-Kernel-Tuning-and-Hardening/blob/master/kernel_hardening_tuning.sh
	# https://gist.github.com/sokratisg/98d03e20fca76d4b699f

PSJoshi / file limits

Created March 8, 2015 09:30

linux - file and process limits

	$ sudo vi /etc/security/limits.conf
	Add:

	* soft nofile 65535
	* hard nofile 65535
	* soft nproc 32768
	* hard nproc 32768

	# Note - instead of , you can add any user! means - setting applies to all the users.

PSJoshi / ntp-update

Last active July 13, 2016 03:51

ntp time synchronzation

PSJoshi / elasticsearch-curator-indices

Created March 16, 2015 10:02

elasticsearch-curator

	[root@mgr ELK]# curator --version
	curator, version 3.0.0
	[root@mgr ELK]$ which curator
	/usr/bin/curator

	[root@mgr ELK]# curator --host 10.4.0.45 bloom indices --time-unit days --timestring "%Y-%m-%d" --older-than 2
	2015-03-16 15:21:03,404 INFO Job starting...
	2015-03-16 15:21:03,556 WARNING Bloom filters no longer exist for search in Elasticsearch since v1.4.0

PSJoshi / elasticsearch-tunning

Last active August 29, 2015 14:17

Elasticsearch tunning

	vi /etc/elasticsearch/elasticsearch.yml
	#Add the following line somewhere in the file, to disable dynamic scripts:
	script.disable_dynamic: true
	bootstrap.mlockall: true
	http.cors.allow-origin: "/.*/"
	http.cors.enabled: true


	#Add to /etc/sysctl.conf
	fs.file-max = 65536

PSJoshi / jinja.py

Last active August 29, 2015 14:17

python-jinja example

	#!/usr/bin/env python
	import os
	from jinja2 import Environment, FileSystemLoader

	dir_path = os.path.dirname(os.path.abspath(__file__))

	t_environment = Environment(
	autoescape=False,
	#loader=FileSystemLoader(os.path.join(dir_path, 'templates')),
	loader=FileSystemLoader(os.path.dirname(os.path.abspath(__file__))),

PSJoshi / rpm-commands

Created March 21, 2015 11:58

RPM information

	##compare rpm versions and lot of utilities related to rpm
	# yum install rpmdevtools

	## Information about repository -
	# yum install yum-utils

	You can also do:
	# yum info openssl
	# yumdb info 'python*'

PSJoshi / firefox-addon.txt

Created April 7, 2015 04:41

Firefox add-on offline installation

	1) Right-click the extension download link (in Mozilla Add-ons, where it says "Download Now"), select "Save Link As..." and download/SAVE .xpi file to your computer in a location where you can find it later.

	2) Manually install it by dragging the file onto an open Firefox window.

PSJoshi / logstash-grok-filter.txt

Last active August 29, 2015 14:18

logstash grok parser for httpd and squid

	apache web server
	=================

	Feb 18 13:42:48 www http_access: 120.61.15.50 - - [18/Feb/2015:13:42:48 +0530] "GET / HTTP/1.1" 200 31413
	Feb 18 13:42:48 www http_access: 49.248.46.26 - - [18/Feb/2015:13:42:48 +0530] "GET /SpryAssets/SpryMenuBarDownHover.gif HTTP/1.1" 200 55
	#%{MONTH}\ %{MONTHDAY}\ %{TIME}\ %{WORD:user}\ %{WORD:access}\: %{IP:ip} \- \- \[%{MONTHDAY}/%{MONTH}/%{YEAR}:%{TIME} %{NUMBER}\] "%{WORD:http_method} / %{WORD:http}/%{NUMBER:http_ver}" %{NUMBER:response_code} %{NUMBER:bytes}

	%{MONTH}\ %{MONTHDAY}\ %{TIME}\ %{WORD:user}\ %{WORD:access}\: %{IP:ip} \- \- \[%{MONTHDAY}/%{MONTH}/%{YEAR}:%{TIME} %{NUMBER}\] "%{WORD:http_method} %{URIPATH} %{WORD:http}/%{NUMBER:http_ver}" %{NUMBER:response_code} %{NUMBER:bytes}

	Squid

PSJoshi / kmeansExample.py

Last active August 29, 2015 14:18 — forked from iandanforth/kmeansExample.py

	#############################################################################
	# Full Imports

	import sys
	import math
	import random
	import subprocess

	"""
	This is a pure Python implementation of the K-Means Clustering algorithmn. The

Pradyumna Joshi PSJoshi