utils

#!/bin/bash
#
# Support functions for Lab

LOGFILENAME="docker.log"

log () {
export LOGFILE="$LOGFILENAME"
   if [ "$LOGFILE" ]
   then
      echo "$*" >> $LOGFILE
   else
      touch "$LOGFILENAME"
      echo "$*" >> $LOGFILE
   fi
}

function ctrl_c() {
       temp=$(tty)
       ps -ef | grep sshd | grep @${temp:5} | awk '{print "kill -9", $2}' | sh
}

swap_add () {
   #SWAP increase in ubuntu if its -le 2GB
   # Check if we want increase swap file i.e. it is less than 2 GiB
   if  [ "$(free | awk '/^Swap:/ { print $2 }')" = "0" ] || [ "$(free --bytes | awk '/^Swap:/ { print $2 }')" -lt 2147483648 ] 
   then
      swapoff -a
      dd if=/dev/zero of=/swapfile bs=7G count=8
      chmod 600 /swapfile
      mkswap /swapfile
      swapon /swapfile
      echo "/swapfile none swap sw 0 0" >> /etc/fstab
   fi
}

all_docker_stop () {
        docker stop $(docker ps -a -q)
}

all_docker_remove () {
         docker stop $(docker ps -a -q)
         docker rm $(docker ps -a -q)
         #Clear Cache in Linux
	      sync; echo 1 > /proc/sys/vm/drop_caches
	      sync; echo 2 > /proc/sys/vm/drop_caches
	      sync; echo 3 > /proc/sys/vm/drop_caches
}

update_upgrade (){
      apt-get -y update
      apt-get -y upgrade
}

install_tool (){
      apt-get -y install git dialog docker.io
}