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From: Bruce Meyer on 20 Jan 2010 14:25
I have tried this several ways. Apprarently I am just doing something
very basic incorrectly.
I need to upload an updated iso once a week.
I want to remove the old iso, before uploading the new iso.

I have tried spawning ssh and remove this file as:

#!/usr/bin/expect
set timeout -1
spawn ssh username(a)host.mydomain.com
expect "password:"
send "password\r"
expect username(a)host:~#
send “rm /path/to/file/filename.iso\r\n”

I have tried using :
exec rm -f /path/to/file/filename.iso


I have tried using sftp:
#!/usr/bin/expect
spawn $env(SHELL)
log_file -noappend typescript
spawn sftp username(a)host.mydomain.com
expect "password:"
send "password\n"
expect "sftp> “
send "cd /path/to/file/\n"
expect "sftp> “
send "rm filename.iso\n"
expect "sftp>"
send "mput /Users/bdmeyer/somefilename\n"
expect "sftp> "
send "exit\n"

The only thing that really seems to work ok is connecting and
authenticating.


Does anyone have any idea what I might be messing up?

--Bruce D. Meyer


From: Bruce Meyer on 21 Jan 2010 13:21
I just replaced the direct send "commands\r" with variables and they
work now.
From: Glenn Jackman on 21 Jan 2010 14:34
At 2010-01-20 02:25PM, "Bruce Meyer" wrote:
> I have tried this several ways. Apprarently I am just doing something
> very basic incorrectly.
> I need to upload an updated iso once a week.
> I want to remove the old iso, before uploading the new iso.
>
> I have tried spawning ssh and remove this file as:
>
> #!/usr/bin/expect
> set timeout -1
> spawn ssh username(a)host.mydomain.com
> expect "password:"
> send "password\r"
> expect username(a)host:~#
> send ?rm /path/to/file/filename.iso\r\n?

You might want to investigate using ssh keys to login without requiring
a password, and then you don't need expect at all:
ssh user(a)host rm /path/to/file

When you're developing an expect script, do:
exp_internal 1
so you can see what's going on under the hood.

--
Glenn Jackman
Write a wise saying and your name will live forever. -- Anonymous
From: Hai Vu on 25 Jan 2010 13:57
Glenn Jackman was right on the money: Setting up public key
authentication will greatly simplify your workflow. I learned to setup
my system from this page:

http://www.webmonkey.com/tutorial/Automate_a_Remote_Login_Using_SSH-Agent

The instruction here is among the simplest I found.
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