SFTP to send file with bash script

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I'm using key authentication, so password is not an issue. I have a file whose name I know and I simply want to send it to another machine over sftp.

I tried searching but couldn't find this (seemingly simple) question anywhere. Perhaps my Google-fu is simply failing me today.

In short: I'm on my local machine, want to send a file (test.txt) to a remote machine. Authorized keys are already provided. Basically I want to automate these three steps:

sftp root@remote:/root/dropoff
put test.txt
quit

Is there a simple bash command I can use to automate this? The only option I've seen is using a bash script to perform the put/quit and using the -b option to run it. Is there anything cleaner than that? (I'm not interested in using any other applications/tools.)

Thanks!

send sftp file bash
3 Answers

I don't know how sftp was configurable when this question was asked. Anyway, 6 years later, you can put sftp-commands like PUT into a file and then reference this file in your initial sftp-call. The makes the whole process completely non-interactive and easily configurable:

sftp -i /path/to/ssh-key -b /path/to/sftp-commands.txt root@remote:/root/dropoff

....Where sftp-commands.txt just contains

put test.txt; quit
user_30616750
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