Here is some information on various Linux-related tasks or software which might prove useful to someone (including me in the future!). While I predominantly use the Debian distribution, much will be applicable to other distributions too.

• Vim-Outliner - outlining capabilities for vim
• SSH over HTTP - access hosts on an internal network via an HTTP proxy

• Exim - mail server.
• SSHFS - mount remote filesystems over SSH.
• MySQL - tips when working with MySQL.

• ldapvi - LDAP directory editor.
• Mac OSX LDAP Authentication - Configuring and supporting LDAP authentication against OpenLDAP on Mac OSX.
• Samba LDAP integration - enable Samba authentication against an LDAP server.
• Mac OSX AutoFS with LDAP - automatically mount user home directories when authenticating against LDAP.