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How can I replace a string in a file if line starts with another string using sed?
For example, replace this line:
connection = sqlite://keystone:[YOURPASSWORD]@[YOURIP]/keystone
With this line:
connection = mysql://keystone:[email protected]/keystone
417
replace(). This replace function replaces only the first occurrence of the match. To do it for all we have used loop. This replace function takes the index from where it will replace, it takes the length of the string, and the string which will be placed in the place of matched string.
replace() is an inbuilt function in the Python programming language that returns a copy of the string where all occurrences of a substring are replaced with another substring. Parameters : old – old substring you want to replace. new – new substring which would replace the old substring.
Answer:
sed '/^start_string/s/search_string/replace_string/'
Information at http://www.gnu.org/software/sed/manual/sed.html#Addresses
129
You can do simply this :
sed -ri 's/sqlite/mysql/g' YOURFILE
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