As part of a backup script I want to call mv on a file to rename it:
作为备份脚本的一部分，我想在文件上调用mv来重命名它：
mv example.txt example2.txt
If the file doesn't exist, I am receiving the error:
如果该文件不存在，我收到错误：
mv: cannot stat ‘example.txt’: No such file or directory
How do I call the mv only if the file already exists?
仅当文件已存在时，如何调用mv？
I don't really want to redirect stderr to dev/null as I'd quite like to keep any other errors that occur.
我真的不想将stderr重定向到dev / null，因为我很想保留任何其他错误。
2 个解决方案
#1
16
You should test if the file exists
您应该测试该文件是否存在
if [ -f blah ]; then
mv blah destination
fi
#2
9
One-liner:
一内胆：
[ -f old ] && mv old nu
#1
16
You should test if the file exists
您应该测试该文件是否存在
if [ -f blah ]; then
mv blah destination
fi
#2
9
One-liner:
一内胆：
[ -f old ] && mv old nu