Newbie Linux Questions

[Trune]

Got a couple of questions i hope someone can help with.

First of all, say im on SSH, doing some stuff to my sheevaplug, and i want to copy a 1.5tb hard drive to another.
If i send the command to do it, and i close SSH will the copy process be terminated too? If so, is there a way i can send the command to the sheevaplug so it carrys on after i disconnect?

Also, i get about 7mbs when i transfer between USB devices, is there any way to speed this up? It seems very slow. Id expect about 20mbs if this was on a pc... so can i get anywhere close to that?

[restamp]

First of all, say im on SSH, doing some stuff to my sheevaplug, and i want to copy a 1.5tb hard drive to another.
If i send the command to do it, and i close SSH will the copy process be terminated too? If so, is there a way i can send the command to the sheevaplug so it carrys on after i disconnect?

Generally speaking, yes, it will terminate.  There are several options that allow you to run a command outside of your current session.  Check out the "nohup" and "at" commands.  "nohup your-backup-command &" may cause your ssh session to hang when you try to log off, but it should allow the command to continue.  "echo your-backup-command | at now" is also a possibility if you have the right packages loaded.  YMMV.

Also, i get about 7mbs when i transfer between USB devices, is there any way to speed this up? It seems very slow. Id expect about 20mbs if this was on a pc... so can i get anywhere close to that?

What command are you using?

[pingtoo]

There should be no problem. but just in case I would do it in nohup. example

Code:

unix $ nohop your_copy_command source destination >/tmp/copy.log 2>&1 &
unix $ exit

As of the speed, I would imagine if both source and destination are both connect to plug than it will be even slower. CPU moving bits from peripheral have inherit limit on bus speed I doubted it can be make faster.

[Trune]

thanks guys, nohup seems to be doing the trick.

reference the copy speeds ive used cp and rsync.

ive managed to get the speed up with 12mb/s but has anyone seen higher than this?
im sure people spoke of alot better speeds.

i guess its not really a huge issue, but i always like to get the most out of my stuff.

Shame my N wireless speed is still rubbish.

[dattaway]

"screen" is a nice way to log into a shell, detatch it, reattatch later, or connect to the same window multiple times from multiple locations.  Logging out won't kill the screens.

[Trune]

now that one looks really good.

thanks.