How to pass a variable name in cd command linux [closed]

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I have a connection to a SFTP in a shell script but when i try to get some files passing variable name but sends me an error. My code:

set date_file_format [timestamp -format %C%y%m%d]
#some code
expect "sftp>"
send "mget /home/dir/*$date_file_format*.dat /home2/user/dir2 \r"

date_file_format is = 20140117

I want to get all files that contains "20140117" and extension .dat using a wildcard *$date_file_format*.dat

This is the error:

sftp> usage: send [args] string
    while executing
"send "mget /home/dir/*$date_file_format*.dat /home2/user/dir2 \r""
    (file "./bash.sh" line 15)

Any idea why it is happening?

Answer 1

It appears your are trying to execute an expect program using a shell interpreter. expect is a different language and must be executed using the expect interpreter.