backup.sh有：
#!/bin/bash
expect backup.exp
tr -d '\15\32' < backup.templog > backup.log
backup.exp有下一个内容：
#!/usr/bin/expect -f
puts "----------------- [exec date +%Y.%m.%d\ %H:%M:%S] ------ exp start -----\n"
spawn ssh root@someIP2
expect "# "
send "su - postgres\r"
expect "\$ "
send "ls -lh db.dump.gz\r"
send exit\r
send exit\r
interact
当我像下一个手动运行时那样：
bash backup.sh >> backup.templog 2>&1
我接下来，我喜欢：
spawn ssh root@someIP
Linux db01 3.2.0-4-amd64 #1 SMP Debian 3.2.68-1+deb7u1 x86_64
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Wed Sep 2 11:06:02 2015 from someIP2
root@db01:~# su - postgres
postgres@db01:~$ ls -lh /var/lib/postgresql/db.dump.gz
-rw-r--r-- 1 postgres postgres 218M Sep 2 10:39 /var/lib/postgresql/db.dump.gz
postgres@db01:~$ exit
logout
root@db01:~# exit
logout
Connection to someIP2 closed.
但是有了cron（有一条线）：
* * * * * bash backup.sh >> backup.templog 2>&1
我只接下来：
spawn ssh root@someIP2
Linux db01 3.2.0-4-amd64 #1 SMP Debian 3.2.68-1+deb7u1 x86_64
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Wed Sep 2 11:04:13 2015 from someIP1
root@db01:~# su - postgres
postgres@db01:~$
我可以使用cron手动获取相同内容吗？