我想编写一个脚本来验证副本是否成功.
这就是我所拥有的：
这就是我所拥有的：
#!/bin/sh cp home/testing/present.txt home/testing/future.txt echo "Copy Code: $? - Successful" if [ $? != 0 ]; then echo "Copy Code: $? - Unsuccessful" fi
“if”语句未初始化.怎么解决这个？
感谢您的时间.
$？指的是最后一个命令：
原文链接：/bash/384906.html#!/bin/sh cp home/testing/present.txt home/testing/future.txt echo "Copy Code: $? - Successful" # last command: cp if [ $? != 0 ]; then # last command: echo echo "Copy Code: $? - Unsuccessful" # last command: [ fi
如果要重复使用特定命令的状态,只需将结果保存在另一个变量中：
#!/bin/sh cp home/testing/present.txt home/testing/future.txt status=$? echo "Copy Code: $status - Successful" if [ $status != 0 ]; then echo "Copy Code: $status - Unsuccessful" fi
但是,更好的方法是首先简单地测试cp命令：
if cp home/testing/present.txt home/testing/future.txt then echo "Success" else echo "Failure,exit status $?" fi
