Shell Scripting Learning

1. Comments
If you use bash, then in the script file header comment: #/bin/bash
2, the script file with the Read and execute permissions, you can use the./shell.sh to execute, you can also use the SH shell.sh way to execute directly, SH is the soft connection bash
3. Test Judgment Statement Usage
test-d Desktop && echo "is a dir" | | echo "is not a dir"
Find pipe files: Ll/dev | grep ' ^p ', in the dev directory, starts with a pipe file with P
Hard Links: Ln sh01.sh Sh01-hard
4. If Judgment statement
5. Case statement
6. Functions
7. While statement usage
8. For Loop statement usage
9. Until usage

Shell Scripting Learning