Shell
Edit /etc/csh.cshrc

set autolist
set prompt = '%n@%m%#'
setenv PAGER less
alias ls ls -FG


Service
Service configuration: edit /etc/rc.conf, such as:

service1_enable = "YES"
service2_enable = "NO"


Service scripts:
/etc/rc.d/
/usr/local/etc/rc.d/

Locale
Edit /etc/csh.cshrc, such as:

setenv LANG en_US.UTF-8
setenv LC_CTYPE zh_CN.UTF-8
setenv MM_CHARSET UTF-8
setenv XMODIFIERS @im=scim