advanced shell programming

  1. eval
  2. xargs
  3. awk [Aho Weinberger Kernighan]
  4. sed [stream editor]
  5. truncate last line
  6. set -x
  7. I/O重定向
  8. 在双引号内使用单引号,不需要加反斜线;使用双引号需要加反斜线;

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