Erlang通過fix tty驅動的過濾，在R16版本支援帶顏色的控制檯，這個特性在我們做各種監控工具高亮非常有幫助，參見R16的Readme:

Support ANSI in console Unix platforms will no longer filter control sequences to the ttsl driver thus enabling ANSI and colors in console. (Thanks to Pedram Nimreezi)

應用程式方面已經有日誌系統lager率先支援“Colored terminal output (requires R16+)”

我們來演示下：

$ erl
Erlang R16B02 (erts-5.10.3)  [64-bit] [smp:16:16] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V5.10.3  (abort with ^G)
1> [io:fwrite("~s~s",[Level, Color])
1> ||
1> {Level, Color}<-
1> [
1> {debug,     "\e[0;38m" },
1> {info,      "\e[1;37m" },
1> {notice,    "\e[1;36m" },
1> {warning,   "\e[1;33m" },
1> {error,     "\e[1;31m" },
1> {critical,  "\e[1;35m" },
1> {alert,     "\e[1;44m" },
1> {emergency, "\e[1;41m" },
1> {eol,        "\e[0m\r\n"}
1> ]
1> ].
debuginfonoticewarningerrorcriticalalertemergencyeol
[ok,ok,ok,ok,ok,ok,ok,ok,ok]
2> 

效果如下圖：

祝玩得開心。

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