bash programming
Bash Programming
学习地址
BASH Programming - Introduction HOW-TO
编程规范
一些 Debug 技巧
说明: PS4 The value of this parameter is expanded as with PS1 and the value is printed before each command bash displays during an execution trace. The first character of PS4 is replicated multiple times, as neces-sary, to indicate multiple levels of indirection. The default is ”+ ”.
::: tip 日志输出
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