如何写shell脚本

• shell pipeline

  To successfully write a shell script, we have to do three things:

  1. Write a script

  2. Give the shell permission to execute it

  3. Put it somewhere the shell can find it

• Write a script

  A shell script is a file that contains ASCII text.

  vim script.sh :

  #!/bin/bash
  # My first script
  echo "Hello World"
  

  The first line of the script #!/bin/bash is a special construct, called a shebang, given to the system indicating what program is to be used to interpret the script.

  The second line is a comment.

• Setting Permissions

  chmod 755 script.sh
  

• Putting It in Our Path

  ./script.sh
  

• Reference

1. 菜鸟教程
2. Writing Our First Script and Getting It to Work