10 productivity-Boosting bash techniques

① add a line to the top of the file with sed:

Sed-i ' 1s/^/added line \n/' filename

Note: sed-i ' 1s/^/added line/' filename, no \ n ' means adding a sentence before the first line of the file

such as: Comment out the first line sed-i ' 1s/^/#/' filename

② inserting multiple rows of data into a file using the command line:

Cat >> filename << EOF

Xxxxxxxxxxxxxxxxxxx

Xxxxxxxxxxxxxxxxxx

Xxxxxxxxxxxxxxxxx

Eof

Note: EOF is a shorthand for end of file, inserting data between two EOF into a file

③ use Find and sed to manipulate files:

Find.         -type f-name ' *.txt '-exec sed-i ' s/jeff/tom/g ' {} \; Find the file at the end of the current directory and replace Jeff in the file with Tom

Note: You can create a function in the script file, such as:

function find_sed

{

Find. -type f-name ' *.txt '-exec sed-i ' s/$1/$2/g ' {} \;

}

Find_sed Jeff Tom #调用函数 and passed in two external variables Jeff and Tom

For more information see this link: http://www.techug.com/ten-tips-for-wonderful-bash-productivity

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10 productivity-Boosting bash techniques