escrever script de shell
sys_hostname=`hostname`
sys_ip_addrs=`hostname -I`
sys_mem_total=`free -h |awk 'NR==2{print $2}'`
sys_mem_free=`free -h |awk 'NR==2{print $NF}'`
sys_load=`uptime |awk '{print $(NF-2),$(NF-1),$NF}'`
cat<<EOF
主机名: ${sys_hostname}
ip地址: ${sys_ip_addrs}
总内存: ${sys_mem_total}
可用内存: ${sys_mem_free}
系统负载: ${sys_load}
EOF
Mova o arquivo para Arquivos do sistema
cp 01-demo.sh /etc/profile.d/show-info.sh