问题
I'm having trouble installing Homebrew, and it looks like the problem (invalid byte sequence in UTF-8 (ArgumentError) error message) is due to a fault in my PATH. when I run echo $PATH, I get the following (be sure to scroll to the far right in the code block below to see the fault):
/usr/local/mysql/bin:/opt/subversion/bin/:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:PATH=/usr/local/share/python:$PATH:PATH=/usr/local/share/npm/bin:$PATH:export PATH��:/usr/local/git/bin
I have no idea where those strange characters just before the /usr/local/git/bin path are coming from. I'm using bash (tried zshell, same problem). I can't find where this coming from. my .bash_profile file looks clean, too.
回答1:
Examine your ~/.profile, ~/.bash_profile, and ~/.bashrc files. It is also possible that these values are being set in /etc/profile or other system-wide files, but the nature of the errors is such that I would assume they are the result of your own manual edits of your personal files. You're the best judge to decide what you may have changed and when.
Look for entries such as the following:
PATH='/usr/local/share/python:$PATH'
PATH='PATH=/usr/local/share/npm/bin:$PATH'
PATH='export PATH��:/usr/local/git/bin'
They should instead look like
PATH=/usr/local/share/python:$PATH
PATH=/usr/local/share/npm/bin:$PATH
PATH=$PATH:/usr/local/git/bin
# Not strictly necessary -- PATH is already exported
export PATH
See a pattern? These all add a value to PATH by setting it to prefix:$PATH or $PATH:suffix where the new prefix or suffix is the directory where you have installed a local package. Whether the new value should be a prefix or a suffix is probably of little consequence -- except if you are trying to override a system version (say, your /usr/local/git is installed because /usr/bin/git is too old -- then, it's important that your local version comes first in the PATH). There is also a minuscule speed difference the first time you run a command; the shell has to look in more places before finding it if it's at the end of the PATH.
The difference in quoting is significant -- PATH=$PATH:suffix expands to the old value of PATH with :suffix added on, whereas PATH='$PATH:suffix' replaces the old value of PATH with the literal string $PATH with :suffix added on. You're lucky none of this has ended up replacing your original PATH completely, which would render your shell by and large inoperable (at least until you discover that you have to use /bin/ls instead of just ls).
来源：https://stackoverflow.com/questions/27097698/osx-yosemite-invalid-characters-in-path