alfredtso

# Stop PostgreSQL from auto starting
sudo launchctl unload -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.3.plist
 
# Enable PostgreSQL to auto start
sudo launchctl load -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.3.plist

# Start postgres
 $ sudo su postgres
Password:
bash-3.2$ pg_ctl -D /Library/PostgreSQL/9.3/data/ start

alfredtso

--- Actions ---
$Copy                                              <M-C>
$Cut                                               <M-X> <S-Del>
$Delete                                            <Del> <BS> <M-BS>
$LRU                                              
$Paste                                             <M-V>
$Redo                                              <M-S-Z> <A-S-BS>
$SearchWeb                                         <A-S-G>
$SelectAll                                         <M-A>
$Undo                                              <M-Z>

alfredtso

# User/Group managment
gpasswd --delete user group

# Bash

## For loop
for i in {1..5}; do echo "Hi, $i"; done

alfredtso

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

alfredtso

% VXLAN lab based on OpenVSwitch and LXD containers

---

Preamble

The very first idea when I started writing this lab was to illustrate the Virtual Extensible LAN (VXLAN) technology. Now that OpenVSwitch configuration is smoothely integrated in the Debian networking configuration files, this should have resulted in somewhat easy-to-read gist.