编写脚本/root/bin/systeminfo.sh,
当前主机系统信息，包括主机名，IPv4地址，操作系统版本，内核版本，CPU型号，内存大小，硬盘大小。
vim /root/bin/systeminfo.sh
echo "The hostname is: $(hostname)"
echo "The IPv4 address is: $(ifconfig ens33|grep netmask|tr -s " "|cut -d" " -f3)"
echo "The OS version is: $(cat /etc/redhat-release)"
echo "The kernel version is: $(uname -r)"
echo "The CPU is: $(cat /proc/cpuinfo|grep "model name"|cut -d: -f2)"
echo "The memorysize is: $(echo `cat /proc/meminfo |head -n1|cut -d: -f2|tr -d ' '|grep -o "[0-9]\+"`/1024|bc)MB"
echo "The memorysize is: $[`cat /proc/meminfo |head -n1|cut -d: -f2|tr -d ' '|grep -o "[0-9]\+"`/1024]MB"
echo "The disksize is: $(fdisk -l |head -n2|tail -1|cut -d: -f2|cut -d, -f1)"
bash /root/bin/systeminfo.sh