CLI/SSH MOTD Showing System Info

01-header

#!/bin/sh
#
#   01-header - CLI/SSH MOTD
#   Author: W Anders <https://github.com/wranders>
#
#   Written for use with `update-motd` package on
#   Ubuntu/Debian systems, but should work with any MOTD
#   package using the bash shell.
#   Ensure this file has execute permissions
#      ( chmod +x /etc/update-motd.d/01-header )
#
#   OS information is from `os-release`, part of the `systemd` package.
#
#   Displays hardware information and a customizable message.
#
#   Demo ASCII art if from 
#     Text to ASCII Art Generator (TAAG) <http://patorjk.com/software/taag/>
#   Demo art font is `ANSI Shadow`.
#

OS_NAME=$(grep -w NAME /etc/os-release | cut -d'=' -f2 | sed -e 's/^"//' -e 's/"$//')
OS_VERSION=$(grep -w VERSION /etc/os-release | cut -d'=' -f2 | sed -e 's/^"//' -e 's/"$//')
OS_DETAILS=$(uname -mor | awk {'print $3" "$1" "$2'})
UPTIME=$(uptime -p | sed -e 's/^up //')
CPU_TYPE=$(cat /proc/cpuinfo | grep 'model name' | head -1 | cut -d':' -f2 | sed -e 's/^ //')
CPU_LOAD=$(cat /proc/loadavg | awk {'print $1 * 100'})
MEM_TOTAL=$(free -m | head -n 2 | tail -n 1 | awk {'print $2'})
MEM_FREE=$(free -m | head -n 2 | tail -n 1 | awk {'print $4'})
MEM_FREE_PERCENT=$(free -m | head -n 2 | tail -n 1 | awk {'printf( "%.2f", ($4 / $2) * 100);'})
MEM_USED=$(free -m | head -n 2 | tail -n 1 | awk {'print $3'})
MEM_USED_PERCENT=$(free -m | head -n 2 | tail -n 1 | awk {'printf( "%.2f", 100 - (($4 / $2) * 100));'})
SWAP_TOTAL=$(free -m | tail -n 1 | awk {'print $2'})
SWAP_FREE=$(free -m | tail -n 1 | awk {'print $4'})
SWAP_FREE_PERCENT=$(free -m | tail -n 1 | awk {'printf( "%.2f", ($4 / $2) * 100);'})
SWAP_USED=$(free -m | tail -n 1 | awk {'print $3'})
SWAP_USED_PERCENT=$(free -m | tail -n 1 | awk {'printf( "%.2f", 100 - (($4 / $2) * 100));'})
DISK_TOTAL=$(df -h / | tail -n 1 | awk {'print $2'})
DISK_FREE=$(df -h / | tail -n 1 | awk {'print $4'})
DISK_FREE_PERCENT=$(df / | tail -n 1 | awk {'printf( "%.2f", ($3 / $2) * 100);'})
DISK_USED=$(df -h / | tail -n 1 | awk {'print $3'})
DISK_USED_PERCENT=$(df / | tail -n 1 | awk {'printf( "%.2f", 100 - (($3 / $2) * 100));'})

cat << EOF
*********************************************************
$OS_NAME $OS_VERSION
   ($OS_DETAILS)

 █████╗ ███████╗ ██████╗██╗██╗     █████╗ ██████╗ ████████╗
██╔══██╗██╔════╝██╔════╝██║██║    ██╔══██╗██╔══██╗╚══██╔══╝
███████║███████╗██║     ██║██║    ███████║██████╔╝   ██║   
██╔══██║╚════██║██║     ██║██║    ██╔══██║██╔══██╗   ██║   
██║  ██║███████║╚██████╗██║██║    ██║  ██║██║  ██║   ██║   
╚═╝  ╚═╝╚══════╝ ╚═════╝╚═╝╚═╝    ╚═╝  ╚═╝╚═╝  ╚═╝   ╚═╝   
                              
*********************************************************
###                  WARNING MESSAGE                  ###
###                                                   ###
### Doesn't have to be a warning, could be legal info ###
*********************************************************

   Uptime:      $UPTIME
   CPU:         $CPU_TYPE
      Load:     $CPU_LOAD %
   Memory:      $MEM_TOTAL M
      Free:     $MEM_FREE_PERCENT % ($MEM_FREE M)
      Used:     $MEM_USED_PERCENT % ($MEM_USED M)
   Swap:        $SWAP_TOTAL M
      Free:     $SWAP_FREE_PERCENT % ($SWAP_FREE M)
      Used:     $SWAP_USED_PERCENT % ($SWAP_USED M)
   Disk:        $DISK_TOTAL
      Free:     $DISK_FREE_PERCENT % ($DISK_FREE)
      Used:     $DISK_USED_PERCENT % ($DISK_USED)

*********************************************************

EOF