shell脚本实战

想写个脚本，发现都忘了，蛋疼，一边回忆一边查一边写，总算完成了，贴在下面：

 #!/bin/bash
 #Program:
 #   This program can help you quickly redeploy the project
 #History:
 # //    shichaogeng    First release

 #variable
 jar_file="usp-lm-1.1.4.jar"
 project="usp-lm"
 project_path_prefix="/alidata/projects/"
 project_path_midfix="/Atomcat/webapps/"
 project_path_suffix="/WEB-INF/lib"
 source_path="/alidata/source_code/"

 #accept the parameters
 if [ ! -n "${1}"]; then
     jar_file="${1}"
 fi
 if [ ! -n "${2}"]; then
     project="${2}"
 fi

 #judge if exist
 if [ ! -f "$source_path$jar_file" ]; then
     echo "The jar is not exist in the path $source_path"
 fi
 if [ ! -d "$project_path_prefix$project" ]; then
     echo "The project is not exist in the path $project_path_prefix"
 fi

 #ready
 cd $project_path_prefix$project$project_path_midfix$project$project_path_suffix
 rm -rf $jar_file
 cp $source_path$jar_file ./
 cd $project_path_prefix$project/Atomcat
 pid=$(ps x | grep "usp-lm" | grep -v grep | awk '{print $1}')
 kill - $pid
 rm -rf logs/*
 rm -rf work/*

 #restart
 ./bin/startup.sh
 tail -f logs/catalina.out

写这么个玩意弄了一小时，笑cry。