bogon:~ apple$ sudu cp composer.phar/usr/local/bin/composer-bash: sudu: command not foundbogon:~ apple$ cd /usr/local/bin/bogon:bin apple$ ls-il-bash: ls-il: command not foundbogon:bin apple$ ls-al-bash: ls-al: command not foundbogon:bin apple$?請問我這邊全局安裝為什么找不到/usr/local/bin/這個目錄呢？我已經用命令行下載下來了composer了，但是這邊全局安裝處問題了。幫忙解決下，謝謝！