Print info after login (/etc/profile.d)

01-banner.sh

#!/bin/sh

echo
echo "************************************************************************"
echo "       _            _               ____       ____      _   _"
echo "      / \  _   _   / \   _ __ ___  / ___| ___ |  _ \ ___| \ | | __ _"
echo "     / _ \| | | | / _ \ | '_ \` _ \| |  _ / _ \| |_) / _ \  \| |/ _\` |"
echo "    / ___ \ |_| |/ ___ \| | | | | | |_| | (_) |  _ <  __/ |\  | (_| |"
echo "   /_/   \_\__, /_/   \_\_| |_| |_|\____|\___/|_| \_\___|_| \_|\__, |"
echo "           |___/                                               |___/"
echo "                      AyamGoreng.Tech Legal Notice"
echo
echo "     This system is for the use of authorized users only. Usage of"
echo "     this system may be monitored and recorded by system personnel."
echo
echo "     Anyone using this system expressly consents to such monitoring"
echo "     and is advised that if such monitoring reveals possible"
echo "     evidence of criminal activity, system personnel may provide the"
echo "     evidence from such monitoring to law enforcement officials."
echo
echo "************************************************************************"
echo

02-sysinfo.bash

#!/bin/bash

f_byte_unit()
{
  if [ $1 -lt 1024 ]; then echo "$1 B"
  elif [ $1 -lt 1048576 ]; then awk "BEGIN {printf \"%.4f kB\",$1/1024}"
  elif [ $1 -lt 1073741824 ]; then awk "BEGIN {printf \"%.4f MB\",$1/1048576}"
  elif [ $1 -lt 1099511627776 ]; then awk "BEGIN {printf \"%.4f GB\",$1/1073741824}"
  else awk "BEGIN {printf \"%.4f TB\",$1/1099511627776}"
  fi
}

f_show_disk()
{
  v_disk_total=0
  v_disk_used=0
  v_disk_avail=0
  while IFS= read -r v_line
  do
    v_disk_total=$(echo "${v_disk_total} + $(echo ${v_line} | awk '{print $2}') * 1024" | bc)
    v_disk_used=$(echo "${v_disk_used} + $(echo ${v_line} | awk '{print $3}') * 1024" | bc)
    v_disk_avail=$(echo "${v_disk_avail} + $(echo ${v_line} | awk '{print $4}') * 1024" | bc)
  done <<< $(df -k | grep "$1")

  v_disk_used_pct=$(awk "BEGIN {printf \"%.2f\",${v_disk_used}/${v_disk_total}*100}")
  v_disk_avail_pct=$(awk "BEGIN {printf \"%.2f\",${v_disk_avail}/${v_disk_total}*100}")

  echo "Disk $1: Total $(f_byte_unit ${v_disk_total}), Used $(f_byte_unit ${v_disk_used}) (${v_disk_used_pct}%), Free $(f_byte_unit ${v_disk_avail}) (${v_disk_avail_pct}%)"
}

f_print_nic()
{
  v_text="Net $1"
  
  if [ -n "$2" ]
  then
    v_text="${v_text} ($2)"
  fi

  echo "${v_text} $3 $4 $5"
}

v_hostname="$(hostname)"
v_os_version="$(cat /etc/os-release | grep PRETTY_NAME | awk -F'"' '{print $2}')"
echo "Hostname: ${v_hostname}, OS: ${v_os_version}"

v_os_platform="$(uname -i)"
v_os_kernel="$(uname -r)"
echo "Platform: ${v_os_platform}, Kernel: ${v_os_kernel}"

v_uptime="$(uptime -p | sed -e 's/^up //' -e 's/,//')"
v_uptime_since="$(date -d "$(uptime -s)" "+%Y-%m-%d %H:%M:%S %z")"
echo "Uptime: ${v_uptime} since ${v_uptime_since}"

v_cpu_usage=$(top -bin1 | grep "^%Cpu(s)" | awk '{print $2+$4+$6}')
v_cpu_count=$(lscpu | grep "^CPU(s): " | awk '{print $2}')
v_process_count="$(ps aux | wc -l)"
echo "CPU: ${v_cpu_count}, Usage: ${v_cpu_usage}%, Processes: ${v_process_count}"

v_memory="$(free -b | grep ^Mem)"
v_memory_total=$(echo ${v_memory} | awk '/^Mem:/ {print $2}')
v_memory_used=$(echo ${v_memory} | awk '/^Mem:/ {print $3}')
v_memory_used_pct=$(awk "BEGIN {printf \"%.2f\", ${v_memory_used} / ${v_memory_total} * 100}")
v_memory_avail=$(echo "${v_memory_total} - ${v_memory_used}" | bc)
v_memory_avail_pct=$(awk "BEGIN {printf \"%.2f\", ${v_memory_avail} / ${v_memory_total} * 100}")
echo "Memory: Total $(f_byte_unit ${v_memory_total}), Used $(f_byte_unit ${v_memory_used}) (${v_memory_used_pct}%), Free $(f_byte_unit ${v_memory_avail}) (${v_memory_avail_pct}%)"

v_swap="$(free -b | grep ^Swap)"
v_swap_total=$(echo ${v_swap} | awk '/^Swap:/ {print $2}')
v_swap_used=$(echo ${v_swap} | awk '/^Swap:/ {print $3}')
v_swap_used_pct=$(awk "BEGIN {printf \"%.2f\", ${v_swap_used} / ${v_swap_total} * 100}")
v_swap_avail=$(echo "${v_swap_total} - ${v_swap_used}" | bc)
v_swap_avail_pct=$(awk "BEGIN {printf \"%.2f\", ${v_swap_avail} / ${v_swap_total} * 100}")
echo "Swap: Total $(f_byte_unit ${v_swap_total}), Used $(f_byte_unit ${v_swap_used}) (${v_swap_used_pct}%), Free $(f_byte_unit ${v_swap_avail}) (${v_swap_avail_pct}%)"

echo $(f_show_disk "/dev/sda1")
echo $(f_show_disk "/dev/sdb1")

while IFS= read -r v_line
do
  if [ -n "$(echo ${v_line} | grep "^[0-9]")" ]
  then
    if [ -n "${v_nic_name}" ]
    then
      f_print_nic "${v_nic_name}" "${v_nic_name2}" "${v_nic_mac}" "${v_nic_status}" "${v_nic_ip}"
      v_nic_name=
      v_nic_status=
      v_nic_name2=
      v_nic_mac=
      v_nic_ip=
    fi
    v_nic_name=$(echo ${v_line} | awk '{print $2}' | sed 's/:$//')
    v_nic_status=$(echo ${v_line} | awk '{print $9}')
  elif [ -n "$(echo ${v_line} | grep "^altname")" ]
  then
    v_nic_name2=$(echo ${v_line} | awk '{print $2}')
  elif [ -n "$(echo ${v_line} | grep "^link")" ]
  then
    v_nic_mac=$(echo ${v_line} | awk '{print $2}')
  elif [ -n "$(echo ${v_line} | grep "^inet ")" ]
  then
    v_nic_ip=$(echo ${v_line} | awk '{print $2}')
  fi
done <<< $(ip a)
f_print_nic "${v_nic_name}" "${v_nic_name2}" "${v_nic_mac}" "${v_nic_status}" "${v_nic_ip}"

echo