SMS en linux

$ esearch sms
[ Results for search key : sms ]
[ Applications found : 6 ]

* net-misc/sms
Latest version available: 1.9.2l
Latest version installed: [ Not Installed ]
Size of downloaded files: [no/bad digest]
Homepage: http://ceti.pl/~miki/komputery/sms.html
Description: Command line program for sending SMS to Polish GSM mobile phone users

* net-misc/esms
Latest version available: 0.9.5
Latest version installed: [ Not Installed ]
Size of downloaded files: [no/bad digest]
Homepage: http://esms.sourceforge.net
Description: A small console program to send messages to spanish cellular phones

* net-misc/ksms [ Masked ]
Latest version available: 0.1.2.4
Latest version installed: [ Not Installed ]
Size of downloaded files: [no/bad digest]
Homepage: http://www.schuerig.de/michael/linux/ksms/index.html
Description: an application for sending and archiving SMS messages using a GSM mobile phone

* net-misc/smssend
Latest version available: 3.3
Latest version installed: [ Not Installed ]
Size of downloaded files: [no/bad digest]
Homepage: http://zekiller.skytech.org/smssend_menu_en.html
Description: Universal SMS sender.

* net-misc/gtkesms
Latest version available: 0.0.4
Latest version installed: [ Not Installed ]
Size of downloaded files: [no/bad digest]
Homepage: http://esms.sourceforge.net
Description: gtk gui for esms.

* net-misc/linuxsms
Latest version available: 0.77
Latest version installed: [ Not Installed ]
Size of downloaded files: [no/bad digest]
Homepage: http://linuxsms.sourceforge.net/
Description: A console perl script for sending SMS to cell phones

Nosotros, en la empresa donde yo trabajo, escribimos un script en perl para enviar y recibir mensajes de texto con un celular motorola C350 pegado al pc por usb en linux, en realidad es muy sencillo, todo se hace por comandos AT.

Existe un modulo de perl en CPAN para facilitar las cosas.
y puedes bajarte la lista de comandos AT que soporta tu telefono desde la pagina del fabricante.
http://search.cpan.org