谷歌的：
On running a cronjob with get command, I was getting the following error.
/bin/sh: GET: command not found
The reason was “get” command was missing from the server and you need to install libwww
Fix :
yum list|grep libwww
yum install perl-libwww-perl
If it is not available in yum, you can do using cpan
cpan
install Bundle::LWP
If the get command is still missing do the following
cp /usr/bin/lwp-request /usr/bin/GET
which GET
/usr/bin/GET