Linux Bash：尝试打开文件时权限被拒绝
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Bash: Permission denied when trying to open a file
提问by Michi
I recently decided to try to learn some bash scripting and as a fun exercise I decided to make a script to open up a daily file for me to write notes in whenever the script is run.
我最近决定尝试学习一些 bash 脚本，作为一个有趣的练习，我决定制作一个脚本来打开一个每日文件，让我在脚本运行时写笔记。
It worked fine until I logged out and back in to the system later, when I received an error
它工作正常，直到我退出并稍后重新登录系统，当我收到错误时
/usr/local/bin/notes: line 45: /home/MY_USERNAME/notes/2010-10-01:Permission denied
/usr/local/bin/notes: line 45: /home/MY_USERNAME/notes/2010-10-01:Permission denied
I might be mistaken, but this certainly doesn't seem like something that shouldn't require extra permissions, does it?
我可能弄错了，但这当然看起来不像是不需要额外权限的东西，不是吗？
Editor is set to nano
编辑器设置为 nano
File's permissions are -rw-rw-r--
文件的权限是 -rw-rw-r--
Script's permissions are -rwxr-xr-x
脚本的权限是 -rwxr-xr-x
采纳答案by djna
My guess is that in
我的猜测是在
$EDITOR $DAILY_FILENAME
$EDITORis null, so it's trying to execute $DAILY_FILENAMEwhich not executable. Probably while you were testing you set EDITOR manually, but didn't add it to your .bashrc (or whatever) file.
$EDITOR为空，所以它试图执行$DAILY_FILENAME哪个不可执行。可能在您测试时手动设置了 EDITOR，但没有将其添加到您的 .bashrc（或其他）文件中。
Use the -xoption to prove it.
使用-x选项来证明它。
回答by hvgotcodes
check the permission on the file with
检查文件的权限
ls -l /path/to/your/file
you should see something like
你应该看到类似的东西
-rw-r--r--
r mean readable, w writeable, and x executable.
r 表示可读，w 表示可写，x 表示可执行。
the first set is for your user, the second set of three is for your group, and the third set is for anyone.
第一组用于您的用户，第二组三个用于您的组，第三组用于任何人。
so in my example, the file i have shown is read/write for me, and read only for my group and for any other user.
所以在我的例子中，我显示的文件对我来说是读/写的，而对我的组和任何其他用户来说都是只读的。
Use the chmod command to change permissions.
使用 chmod 命令更改权限。
chmod 744 file
will make the file read/write/exec for you, and just read for user/world.
将使文件为您读/写/执行，并为用户/世界读取。
回答by Andrew Walker
If I had to guess, I would suggest that the $EDITORenvironment variable is undefined for some reason. It looks like your script is attempting to execute the notes file - as this isn't executable you get the unhelpful error message.
如果我不得不猜测，我会建议$EDITOR由于某种原因未定义环境变量。看起来您的脚本正在尝试执行注释文件 - 因为这不是可执行文件，所以您会收到无用的错误消息。
