kva (Rootserver) --- ned (Linux-router) --- marge (OS X desktop) screen-session with mutt as MUA --- just a hop host --- here I sit infront of the computer ;-)
I am using the host marge as a desktop but I mostly work through a ssh-session to the host ned and another one to host kva in a GNU screen-session on kva.
Don't know GNU screen? If you're working with terminals, you've missed the best tool: http://en.wikipedia.org/wiki/GNU_Screen
Desired feature: when I press a magic key combination, the currently shown content of my screen windows gets parsed for hyperlinks, a window pops up where I can choose one of the found URLs and after selecting it, it gets opened as a new tab on my desktop Firefox browser in OS X. Cool eh? ;-)
Things that have to be accomplished::
- enable ssh backward tunnel through ssh from kva to marge
- enable ssh-login from kva to marge without entering a password
- create a screen-mechanism to extract URLs
- invoke a command that opens the URL on my Firefox
Starting the ssh backward tunnel when connecting to kva (from ned):
vk@ned ~ % grep ssh .zshrc.local alias kva="ssh email@example.com -R 4242:marge:22" vk@ned ~ %
Note: if you connect directly from OS X to the host with the screen session, you can choose "4242:localhost:22" too, without the need of the router hop in between.
enable ssh-login from kva directly to marge without entering a password:
vk@kva ~ % cd .ssh vk@kva ~/.ssh % ssh-keygen -t rsa [...generating key pair without passphrase...] vk@kva ~/.ssh % cat id_rsa.pub | ssh vk@localhost -p 4242 'cat >> .ssh/authorized_keys' vk@kva ~/.ssh
You can do the last step even more cool by using ssh-copy-id. (Have a look on the man-page for further details):
Alternative method using ssh-copy-id:
vk@kva ~ % ssh-copy-id -i .ssh/id_rsa.pub firstname.lastname@example.org 15 Password: Now try logging into the machine, with "ssh 'email@example.com'", and check in: .ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting. vk@kva ~ %
To extract URLs from a file, you can use urlview.
my urlview configuration:
vk@kva ~ % cat .urlview # # Sample urlview(1) configuration file # # regular expression to use to match URLs REGEXP (((http|https|ftp|gopher)|mailto):(//)?[^ <>"\t]*|(www|ftp)[0-9]?\.[-a-z0-9.]+)[^ .,;\t\n\r<">\):]?[^, <>"\t]*[^ .,;\t\n\r<">\):] # command to invoke for selected URL COMMAND ssh vk@localhost -p 4242 open vk@kva ~ %
manual remote opening test of URLs with urlview:
vk@kva ~ % echo http://www.heise.de >deleteme vk@kva ~ % urlview deleteme [ choose URL and press Enter twice ] [ URL gets opened in Firefox! ] vk@kva ~ %
create a screen-mechanism to extract URLs:
vk@kva ~/.screen % grep urlview default_bind bind U eval "hardcopy_append off" "hardcopy -h /tmp/screen-urlview.tmp" "screen urlview /tmp/screen-urlview.tmp; rm /tmp/screen-urlview.tmp" vk@kva ~/.screen %
Note: the file "default_bind" from above is sourced in my ~/.screenrc so you can put the line there also.
Now whenever I press "Ctrl-a U" in screen, a dialog pops up with all the URLs found in the current screen and I can choose, which one of those will be opened in my browser. Jeah, Baby jeah!
Note: If you are using mutt as MUA, I described a method to simply copy mail attachments to the OS X desktop which is found in the blog entry "Attachment handling from mutt to OS X (over the network)"