查看GNU/Linux Tips的源代码

=== if ===

* -e checks if a file or directory exists, regardless of its type
* -f checks if the path exists and refers to a regular file (not a directory, symbolic link, etc.)
* -d checks if the path exists and refers to a directory

<source lang=bash>
FILE="/path/to/your/file.txt"
if [ -e "$FILE" ]; then
  echo "File exists."
else
  echo "File does not exist."
fi
</source>