The awk, sed command for Linux

Summary: The regular expressions for the two commands are distinguished by ' single quotation marks.

The output variable name is quoted in single quotes, and the output variable value is quoted in double quotes, which is generally common in bash scripts.

To use a variable value in a bash script, enclose the double quotation mark

awk usage:

Reference URL: http://www.cnblogs.com/xudong-bupt/p/3721210.html

Command form:

awk [-f|-f|-v] ' begin{}//{command1; Command2} end{} ' file

Separate the Product_uuid line with "=" to display the second parameter content

Awk-f "=" '/product_uuid/{print $ '/etc/save_env

SED usage:

Reference URL: http://www.cnblogs.com/dong008259/archive/2011/12/07/2279897.html

sed [-nefri] ' command ' file

Note: If you want to replace the source file content directly without the screen output, add the option-I, which is sed-i

Example: Delete the line contents of Ipguard beginning in the file installed.db

Sed-i '/ipguard/d ' setup/installed.db

The awk, sed command for Linux