Remote Commands Over SSH

Checksum Commands

Your offsite filesystem has access to the following checksum commands:

md5, sha1, sha256 and rmd160

Remote checksums are run in this manner:

ssh 1234@sync.coaly.net sha256 some/file

Pipelining Through 'dd' (Database Dumps)

pg_dump -U postgres db | ssh 1234@sync.coaly.net

 \ 
 "dd of=db_dump"

or perhaps:

mysqldump -u mysql db | ssh 1234@sync.coaly.net

 \ 
 "dd of=db_dump"

Miscellaneous Unix Commands

The other remote commands that can be used over ssh are:

echo, cp (GNU), ls, mkdir, pwd, chmod, ln, mv, rm, rmdir, touch, chgrp, groups, id, passwd, quota

For example, you can run something like:

ssh 1234@sync.coaly.net touch some/file

and then:

ssh 1234@sync.coaly.net rm -rf some/other/file

The 'passwd' command is special, as it requires a '-t'

ssh -t 
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  passwd