shell脚本开头通用模板

#!/bin/bash
source /etc/profile
source ~/.bash_profile

set -o nounset
set -o errexit

#Author: gupx
#Time: 2020-10-30 19:11:02
#Name: test.sh
#Description: This is a test shell script.

useage(){
echo "useage: ./test.sh M/D"
echo "example: ./test M/D"
}

log(){
now_time='['$(date +"%Y-%m-%d %H:%M:%S")']'
echo ${now_time} $1 | tee -a ${log_file}
}