我写了一个期望脚本

vi /foo/force-zypper-patch.exp
cat /foo/force-zypper-patch.exp
#!/usr/bin/expect

set timeout 300
spawn "/usr/bin/zypper patch"
expect "Continue? [y/n/...? shows all options] (y): " { send "y\r" }
interact

但是即使我的zypper具有完整路径，它也会失败：

SERVER1:~ # ssh SERVER2 "/usr/bin/expect -f /foo/force-zypper-patch.exp"
spawn /usr/bin/zypper patch
couldn't execute "/usr/bin/zypper patch": no such file or directory
    while executing
"spawn "/usr/bin/zypper patch""
    (file "/foo/force-zypper-patch.exp" line 4)
SERVER1:~ #
SERVER1:~ # ssh SERVER2 "which zypper"
/usr/bin/zypper
SERVER1:~ #

尽管我可以通过“ zypper补丁-y --with-interactive”达到我的目的，但我会很感兴趣，该怎么做呢？