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/bashecho -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 [ $vserver -gt 0 ]thenecho "$(hostname) is a VM"elsecat /sys/class/fc_host/host?/port_namefiecho ""echo -e "-------------------------------Oracle DB Instances---------------------------"if id oracle >/dev/null 2>&1; then/bin/ps -ef|grep pmonthenelseecho "oracle user does not exist on $(hostname)"fiecho ""if (( $(cat /etc/*-release | grep -w "Oracle|Red Hat|CentOS|Fedora" | wc -l) > 0 ))thenecho -e "-------------------------------Package Updates-------------------------------"yum updateinfo summary | grep 'Security|Bugfix|Enhancement'echo -e "-----------------------------------------------------------------------------"elseecho -e "-------------------------------Package Updates-------------------------------"cat /var/lib/update-notifier/updates-availableecho -e "-----------------------------------------------------------------------------"fi

-------------------------------System Information---------------------------Hostname:      daygeek-Y700uptime:       1:20 1Manufacturer:    LENOVOProduct Name:    80NVVersion:       Lenovo ideapad Y700-15ISKSerial Number:    AA0CMRN1Machine Type:    PhysicalOperating System:  Manjaro LinuxKernel:       4.19.80-1-MANJAROArchitecture:    x86_64Processor Name:   Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHzActive User:     daygeek renu thanuSystem 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)-----------------------------------------------------------------------------