linux - 了解 PATH 变量和软链接

Question

请帮助我了解my-ls -l ~/bin/my-ls正在尝试做什么？

$ ln -s $(which ls) ~/bin/my-ls   # symlink
$ which my-ls
/home/user/bin/my-ls
$ my-ls -l ~/bin/my-ls
lrwxrwxrwx 1 user user 7 2010-10-27 18:56 my-ls -> /bin/ls
$ my-ls          # lookup through $PATH
bin  desktop  documents  downloads  examples.desktop  music
$ ~/bin/my-ls    # doesn't use $PATH to lookup
bin  desktop  documents  downloads  examples.desktop  music

标签： linuxunix