错误的路径：

查找结果：

/opt/rh/php54/root/usr/bin/php
                           ^^^--- your php binary

$ PATH仅期望 DIRECTORIES 。您在$ PATH中列出了上述路径，这意味着Shell将搜索 ... / usr / bin / php / php 。请注意加倍的 php 。第一个是您在$ PATH中添加的目录，第二个是您尝试运行的程序。 $ PATH条目应为 ... / usr / bin / ，而没有 php 。

$PATH expects only DIRECTORIES. You listed the above path in $PATH, which means that the shell will be searching for .../usr/bin/php/php. Note the doubled php. First one is the "directory" that you added in $PATH, while the second one is the program you're trying to run. The $PATH entry should be JUST .../usr/bin/, WITHOUT the php.