= bash =
Bourne again shell.

== Server loop ==
{{{#!highlight bash
#!/bin/sh
# restart the server in case of failure
logger "Starting server.py"
until /usr/bin/python server.py 1234; do
    logger "Server crashed with exit code $?.  Respawning.."
    sleep 1
done
}}}

== Add extra IP address to NIC ==
Adapted from http://unclean.org/howto/secondip.html

Add extra IP 192.168.1.5 to NIC eth0
{{{#!highlight bash
ifconfig eth0:0 192.168.1.5
route add -host 192.168.1.5 dev eth0:0
}}}

== Check port running ==
{{{#!highlight bash
#!/bin/sh
RES=`netstat -at -n |  grep 0.0.0.0:12345 | wc -l`
if [ $RES -eq '1' ]
then
  logger 'Process running'
else
  logger 'Process not listening on port 12345'
  /sbin/service processx restart 
  logger 'Process restarted'
fi
}}}

{{{#!highlight bash
#!/bin/sh
RES=`netstat -at -n |  grep 0.0.0.0:12345 | wc -l`
if [ $RES -ne '1' ]
then
  logger 'Process not listening on port 12345'
  /sbin/service processx restart 
  logger 'Process restarted'
fi
}}}

== ColorBash prompt ==
https://wiki.archlinux.org/index.php/Color_Bash_Prompt

 * start coloring: \[\e[color\]
 * end coloring: \[\e[m\]
 * \e[0;32m\] #green color
 * \e[0;33m\] #yellow color

== Network interface data daily ==
rxtxData.sh:
{{{#!highlight bash
#!/bin/sh
# chmod 755 rxtxData.sh
# crontab -e
# @daily /root/rxtxData.sh
CURR=`date -u`
DATA=`ifconfig eth0 | grep "RX bytes" | sed "s/:/ /g"`
echo [$CURR] $DATA >> /root/rxtxData.log
}}}

== SSH Ubuntu bash colors ==

'''~/.bash_profile'''
{{{
if [ -f ~/.bashrc ]; then
  . ~/.bashrc
fi
}}}

'''~/.bashrc'''
{{{
alias ls='ls --color'
alias ps='ps faxo pid,user:32,comm'
#PS1="\e[0;33m\]\D{%Y-%m-%d}T\A\[\e[m\] \e[0;32m\]\u@\H:\w\r\n\$\[\e[m\] "
export PS1="\e[0;33m\]\D{%Y-%m-%d}T\A\[\e[m\] \e[0;32m\]\u@\H:\w\r\n\$\[\e[m\] "
PATH=$PATH:/opt/java/jdk1.8.0_162/bin:/opt/java/apache-maven-3.5.3/bin
}}}