Bash 脚本实现每次登录到 Shell 时可以查看 Linux 系统信息

# vi /opt/scripts/system-info.sh
#!/bin/bash
echo -e "-------------------------------System Information----------------------------"
echo -e "Hostname:\t\t"`hostname`
echo -e "uptime:\t\t\t"`uptime | awk '{print $3,$4}' | sed 's/,//'`
echo -e "Manufacturer:\t\t"`cat /sys/class/dmi/id/chassis_vendor`
echo -e "Product Name:\t\t"`cat /sys/class/dmi/id/product_name`
echo -e "Version:\t\t"`cat /sys/class/dmi/id/product_version`
echo -e "Serial Number:\t\t"`cat /sys/class/dmi/id/product_serial`
echo -e "Machine Type:\t\t"`vserver=$(lscpu | grep Hypervisor | wc -l); if [ $vserver -gt 0 ]; then echo "VM"; else echo "Physical"; fi`
echo -e "Operating System:\t"`hostnamectl | grep "Operating System" | cut -d ' ' -f5-`
echo -e "Kernel:\t\t\t"`uname -r`
echo -e "Architecture:\t\t"`arch`
echo -e "Processor Name:\t\t"`awk -F':' '/^model name/ {print $2}' /proc/cpuinfo | uniq | sed -e 's/^[ \t]*//'`
echo -e "Active User:\t\t"`w | cut -d ' ' -f1 | grep -v USER | xargs -n1`
echo -e "System Main IP:\t\t"`hostname -I`
echo ""
echo -e "-------------------------------CPU/Memory Usage------------------------------"
echo -e "Memory Usage:\t"`free | awk '/Mem/{printf("%.2f%"), $3/$2*100}'`
echo -e "Swap Usage:\t"`free | awk '/Swap/{printf("%.2f%"), $3/$2*100}'`
echo -e "CPU Usage:\t"`cat /proc/stat | awk '/cpu/{printf("%.2f%\n"), ($2+$4)*100/($2+$4+$5)}' | awk '{print $0}' | head -1`
echo ""
echo -e "-------------------------------Disk Usage >80%-------------------------------"
df -Ph | sed s/%//g | awk '{ if($5 > 80) print $0;}'
echo ""
echo -e "-------------------------------For WWN Details-------------------------------"
vserver=$(lscpu | grep Hypervisor | wc -l)
if [ $vserver -gt 0 ]
then
echo "$(hostname) is a VM"
else
cat /sys/class/fc_host/host?/port_name
fi
echo ""
echo -e "-------------------------------Oracle DB Instances---------------------------"
if id oracle >/dev/null 2>&1; then
/bin/ps -ef|grep pmon
then
else
echo "oracle user does not exist on $(hostname)"
fi
echo ""
if (( $(cat /etc/*-release | grep -w "Oracle|Red Hat|CentOS|Fedora" | wc -l) > 0 ))
then
echo -e "-------------------------------Package Updates-------------------------------"
yum updateinfo summary | grep 'Security|Bugfix|Enhancement'
echo -e "-----------------------------------------------------------------------------"
else
echo -e "-------------------------------Package Updates-------------------------------"
cat /var/lib/update-notifier/updates-available
echo -e "-----------------------------------------------------------------------------"
fi

-------------------------------System Information---------------------------
Hostname:      daygeek-Y700
uptime:       1:20 1
Manufacturer:    LENOVO
Product Name:    80NV
Version:       Lenovo ideapad Y700-15ISK
Serial Number:    AA0CMRN1
Machine Type:    Physical
Operating System:  Manjaro Linux
Kernel:       4.19.80-1-MANJARO
Architecture:    x86_64
Processor Name:   Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
Active User:     daygeek renu thanu
System Main IP:   192.168.1.6 192.168.122.1
-------------------------------CPU/Memory Usage------------------------------
Memory Usage:   37.28%
Swap Usage:    0.00%
CPU Usage:    15.43%
-------------------------------Disk Usage >80%-------------------------------
Filesystem   Size Used Avail Use Mounted on
/dev/nvme0n1p1 217G 202G 4.6G 98 /
/dev/loop0   109M 109M   0 100 /var/lib/snapd/snap/odrive-unofficial/2
/dev/loop1    91M  91M   0 100 /var/lib/snapd/snap/core/6405
/dev/loop2    90M  90M   0 100 /var/lib/snapd/snap/core/7713
-------------------------------For WWN Details-------------------------------
CentOS8.2daygeek.com is a VM
-------------------------------Oracle DB Instances---------------------------
oracle user does not exist on CentOS8.2daygeek.com
-------------------------------Package Updates-------------------------------
  13 Security notice(s)
     9 Important Security notice(s)
     3 Moderate Security notice(s)
     1 Low Security notice(s)
  35 Bugfix notice(s)
   1 Enhancement notice(s)
-----------------------------------------------------------------------------