Java项目执行bash脚本遇两类“No such file or directory”错误求助

Hey there, let's fix this step by step—no terminal expertise required, I'll keep it clear!

先搞懂两个报错的原因 #

1. 为什么去掉点会提示文件找不到？ #

When you changed the path to /runtime/updatemcp.py, that's an absolute path—it tells the system to look for a runtime folder directly in your system's root directory (/), not the folder you're currently in. That's why it can't find the file, even though runtime is right there with you. You need to keep the relative path: either ./runtime/updatemcp.py (the dot means "current directory") or just runtime/updatemcp.py (both work the same here).

2. 为什么保留点会提示python2: No such file or directory？ #

Your script is trying to run the Python 2 interpreter, but your system doesn't have it installed, or it's not available under the python2 command. Most modern systems default to Python 3 now, so we need to fix this part.

具体解决方法 #

Pick one of these options based on what works for your setup:

Option 1: Install Python 2 (if the script requires it) #

If the updatemcp.py script only works with Python 2, install it via your system's package manager:

• Ubuntu/Debian: Open terminal and run sudo apt update && sudo apt install python2
• Mac (with Homebrew): Run brew install python@2

Once installed, run your script again: bash updatemcp.sh—it should find Python 2 now.

Option 2: Modify the script to use Python 3 (if the script is compatible) #

If updatemcp.py works with Python 3 (many old scripts do now), edit your updatemcp.sh script:

1. Open the script in a text editor (like nano updatemcp.sh in terminal)
2. Change the second line to:

   python3 ./runtime/updatemcp.py "$@"
   

3. Save and exit (in nano, press Ctrl+O, then Enter, then Ctrl+X)

Now run the script again—it'll use Python 3 instead of looking for Python 2.

Option 3: Create a soft link for Python 2 (if you already have it but it's named differently) #

If you have Python 2 installed but it's called something like python2.7 instead of python2, create a link so the system recognizes the python2 command:
Run sudo ln -s /usr/bin/python2.7 /usr/local/bin/python2 (replace /usr/bin/python2.7 with the actual path to your Python 2 executable if it's different).

Quick checks to confirm everything's in place #

Before running the script again, verify these to avoid extra headaches:

• Make sure you're in the right folder: Run ls and you should see updatemcp.sh and the runtime folder listed.
• Confirm updatemcp.py exists: Run ls runtime and check for the file.
• Verify your Python setup: Run python2 --version (if you installed it) or python3 --version to make sure the interpreter is working.

内容的提问来源于stack exchange，提问作者Miloertas