cd /etc/alternatives
ll php* lrwxrwxrwx 1 root root 15 Oct 23 15:24 php -> /usr/bin/php7.3* lrwxrwxrwx 1 root root 31 Oct 23 15:00 php.1.gz -> /usr/share/man/man1/php7.3.1.gz
删除软链接,相当删除win下的快捷方式
rm -rf php
快捷方式删除、但/usr/bin/php7.3文件不删除
ll lrwxrwxrwx 1 root root 31 Oct 23 15:00 php.1.gz -> /usr/share/man/man1/php7.3.1.gz ll /usr/bin/php* lrwxrwxrwx 1 root root 21 Oct 23 15:00 /usr/bin/php -> /etc/alternatives/php*
-rwxr-xr-x 1 root root 4488224 Sep 2 22:08 /usr/bin/php5.6*
-rwxr-xr-x 1 root root 4704192 Oct 8 14:29 /usr/bin/php7.3*
建立php5.6的快捷方式
ln -s /usr/bin/php5.6 php
ll php* lrwxrwxrwx 1 root root 15 Oct 23 15:24 php -> /usr/bin/php5.6* lrwxrwxrwx 1 root root 31 Oct 23 15:00 php.1.gz -> /usr/share/man/man1/php7.3.1.gz
root@iZwz93telmwbh624e5zetqZ:/etc/alternatives# php -v
PHP 5.6.40-12+ubuntu16.04.1+deb.sury.org+1 (cli)
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend Technologies
with Xdebug v2.5.5, Copyright (c) 2002-2017, by Derick Rethans