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Bash
nginx_pgspd_build.sh
One Liners
Init Script Skeleton Example
Python
MySQLdb
Ruby
Source Code Installation
Nokogiri
Commands
alias
dig
dmidecode
find
glances
hping
httperf
httpry
ipmitool
last
mkfs.ext4
ngrep
nping
renice
rsync
sysbench
tmux
vnstat
Configuration
Configuration Management
Chef
Add a Node to Chef
Create a Cookbook
Puppet
Adding a Node to Puppet
Puppet Cert Management
Puppet Dashboard
Puppet Server (Master) Installation
SaltStack
top file - manage states
serve files
Date and Time Settings
Set Date and Time
Timezone Settings
Desktop
Cinnamon on CentOS 7
Environment Variables
Installation
Create CentOS Bootable USB Stick
Kickstart and Cobbler
Configure Cobbler to Prepare Puppet
Minimal CD Install
Storage
GlusterFS
Linux Software Raid
LVM
Mounting and Unmounting Storage
Network Filesystem (NFS)
Ssh Filesystem (sshfs)
UUIDs
Package Management
Third-Party Yum Repos
Build an RPM
Setup Yum Server
Rebuild Corrupted Yum Database
RPM Packages
yum-downloadonly
yumdownloader
Services
Backups
Databases
MySQL
Create Database
innobackupex
Percona Galera Cluster
Show Grants for Users
UPDATE Statement
Postgres
List Databases
Monitoring Queries
Replication
Pause and Resume Replication
pg_top
Hadoop
Single Node CentOS Hadoop
Fix Corrupt Blocks on HDFS
Emptying the HDFS Trash
Monitoring
Cacti
Graphite
Carbon Whisper Files (.wsp)
Nagios
Network and Security
CentOS Network Settings
ether-wake
ethtool
Fail2Ban
FirewallD
GPG Encryption
GRE Tunnel
hosts file
icmp_echo_ignore_broadcasts
iperf
IPSec Tunnel
IPTables
hide filtered ports
ip_forward
Nic Bonding
OpenVPN
Password Hashes
PopTop VPN (pptpd)
proxy_arp
Rancid
resolv.conf
route
SELinux
Sudo
tcpdump
vtun
Wireshark
TCP Timestamps
ICMP Timestamps
tcp_syncookies
tcp_max_syn_backlog
tcp_rfc1337
rp_filter
Change Hostname
Source Code Management (SCM)
Git
Virtualization
OpenVZ
20GB Container Conf
30GB RAM Container
40GB RAM Container
vzmigrate
vzsplit
Virtualbox
Web Services
Nginx
server_names_hash_bucket_size
Django and Postgres Duplicate Key
Django Backup/Restore Data
Logrotate
Memcached
Clear Memcache Contents
Load Balancing
HAProxy
HAProxy SSL Termination
Elasticsearch
Web Services:
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