Bash脚本高级指南（Advanced Bash-Scripting Guide）是学习shell的经典指南，其中内容详细，实例丰富，且根据Bash的发展不断更新，此资源是Advanced Bash-Scripting Guide的最新版本6.6，更新于2012.11.27，是本人下载官方html版后制作而成，方便大家离线使用。

It is easy to dismiss bash — the typical Linux shell program — as just a command prompt that allows scripting. Bash, however, is a full-blown programming language. I wouldn’t presume to tell you that ...

After the beginners guide, the Advanced Bash Scripting Guide is a good read however be warned that some information and examples found there, such as the first couple ...

You will most often use Bash functions to make your shell life easier; instead of typing out complex command pipelines, create a function and inject arguments. You'd place these in your bashrc file, ...

$ cat </dev/tcp/time.nist.gov/13 55103 09-09-29 17:58:55 50 0 0 0.0 UTC(NIST) * Reads the time in Daytime Protocol (RFC-867) from the NIST Internet Time Service ...