S

SERVER
The dhcp.client passes this environment variable to the /etc/dhcp/dhcp-up script. It indicates the server's IP address.
SHELL
The pathname of the command interpreter, or shell, that you want to use. It's set by login.
SOCKS_NS
The IP address of the domain nameserver that should be used for name resolution by SOCKS client programs.
SOCKS_SERVER
The name or IP address of the SOCKS proxy server host to use, overriding the default server for SOCKS client programs.
STDIO_DEFAULT_BUFSIZE
As a QNX Neutrino extension to POSIX standard I/O, you can use this environment variable to override BUFSIZ as the default buffer size for stream I/O. The value of STDIO_DEFAULT_BUFSIZE must be greater than that of BUFSIZ.
SYSLOG
The node on which syslogd is running.
SYSNAME
The name of the system.