AWK tutorial: three ways of awk execution

Linux awk command execution ways：

1. Command line execution

➜ awk -F" " '{print $2}' test.txt

Detailed introduction of syntax, see 《Linux awk》

2. Shell script file execution

➜ vim test1.awk

#!/usr/bin/awk -f
{
        print $2
}

➜ ./test1.awk  test.txt

Explanation:

!/usr/bin/awk
The first line of #!/usr/bin/awk is the awk command location.

use : ➜ which awk /usr/bin/awk

3. Awk script file execution

➜ vim test.awk
{print $2}

➜  awk -f test.awk test.txt