snmp server installation

CentOS

install: yum install net-snmp-utils
config /etc/snmp/snmp.conf: add  "rocommunity public"

start snmp daemon: /etc/init.d/snmpd start
snmp client check: snmpwalk -v 1 -c public -O e 127.0.0.1
check for autostart: chkconfig snmp


Ubuntu

apt-get install snmp

OSX dev env set up

http://bsfab.co/post/41370114266/mac-a-wonderful-genius-distribution-of-linux

http://vanderveer.be/blog/2013/01/02/automating-the-setup-of-my-perfect-developer-environment-on-osx-10-dot-8-mountain-lion/

postgres configuration

http://www.cyberciti.biz/tips/postgres-allow-remote-access-tcp-connection.html

Remove a passphrase from a private key

• Remove a passphrase from a private key

  openssl rsa -in privateKey.pem -out newPrivateKey.pem

  This is useful for automation such as auto connect a VPN upon logon. 

oracle ucm

• Runs oracle db 11g XE on 10.10.1.158:1521. 
• sudo /etc/init.d/oracle-xe start
• netstat -anpt | grep 1521 to verify listener
• put the following into .bashrc
• 
  
• . /u01/app/oracle/product/11.2.0/xe/bin/oracle_env.sh
• ORACLE_SID=XE
• sqlplus 
• use TNS defined in $ORACLE_HOME/network/admin/tnsnames.ora
• sqlplus system/oracle or sqlplus dev_ocs/oracle 
• select * from global_name (for db)
• show user
• creates a doamin ucm_domain
• starts wls admin server: startWeblogic.sh
• starts wls managed server for cs: startManagedLogic.sh UCM_server1 http://localhost:7001/

python for loop, iterator, iterable, generator

For Loop
 When Python executes the for loop, it first invokes the __iter__() method of the container to get the iterator of the container. It then repeatedly calls the next() method (__next__() method in Python 3.x) of the iterator until the iterator raises a StopIteration exception. Once the exception is raised, the for loop ends.

Generators can be thought of as resumable functions

Solaris 10 cmd

netstat -anf inet -P tcp
netstat -anf inet -P udp

svn merge

Merge trunk to branch

• Under branch, "svn log -v --stop-on-copy" to find out the last revision number such as 70428
• Dry run: svn merge --dry-run -r 70428:HEAD https://svn.blah.com//trunk .
• Real run. 

install kivy on ubuntu 12.04

• sudo apt-get install mesa-common-dev freeglut3-dev
• pip install cython
• pip install kivy
• 
  

cProfile pstats

pstats

OS X make a bootable flash

hdiutil

iso==> dmg
hdiutil convert -format UDRW -o destination.dmg source.iso

dmg==> usb

sudo dd if=source.dmg of=/dev/rdisk1 bs=1m

OS X Python set up

homebrew

ruby <(curl -fsSkL raw.github.com/mxcl/homebrew/go)

install Python from http://www.python.org/getit/mac/

install distribute (easy_install needs it)

wget http://python-distribute.org/distribute_setup.py
$ python distribute_setup.py

install pip,virtualenv 

easy_install pip

pip install virtualenv

pip install virtualenvwrapper

vim .bash_profile

source /virtualenvwrapper.sh

upstart init daemon

Configuration  

/etc/init.conf

/etc/init/*.conf

User Job

$HOME/.init/

Upstart commands

UbuntuBootupHowto 

upstart cookbook

mount windows share from Ubuntu

Install

sudo apt-get install smbfs

Inspect

smbclient //test-https.blah.net/ipc$ -U id -Wdomain

mount

sudo mount -t cifs //remote_windows/share $ $HOME/windows -o user=uid,dom=office

connect to MS SQL server and Sybase from linux

• sudo apt-get install unixodbc unixodbc-dev freetds-dev sqsh tdsodbc
•  cat /etc/freetds/freetds.conf
•  [tds1]
  host = 10.21.1.1
  port = 1433
  tds version = 7.0
  

•  sqsh -S tds1 -U id -P password

browser shortcut with nginx and DNS

OS: Ubuntu

DNS

/etc/hosts
127.0.0.1 foo

Nginx 

in sites-enabled/default

if ( $host = wiki ) {  
   rewrite ^ https://wiki.example.com;
}

Enable SQL server 2012 for TCP

Enable SQL server 2012 for TCP port 1433

nmcli without Network Manager GUI

nmcli 

nmcli con down id VPN_CONN_NAME
nmcli con up id VPN_CONN_NAME
nmcli con

automation with nmcli

network-manager restart

sudo service network-manager restart


To automatically connect VPN.

put "nmcli con up id VPN_CONN_NAME" in .profile (upon login)

gevent

installation

• sudo apt-get install libevent-dev
• pip install gevent

erlang for gaming

http://smyck.net/2012/04/22/why-erlang/