Linux 如果行以另一个字符串开头，则替换文件中的字符串
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Replace string in a file if line starts with another string
提问by BlackBeret
How can I replace a string in a file if line starts with another string using sed?
如果行以使用 sed 的另一个字符串开头，如何替换文件中的字符串？
For example, replace this line:
例如，替换这一行：
connection = sqlite://keystone:[YOURPASSWORD]@[YOURIP]/keystone
With this line:
有了这条线：
connection = mysql://keystone:[email protected]/keystone
回答by anishsane
Answer:
回答：
sed '/^start_string/s/search_string/replace_string/'
Information at http://www.gnu.org/software/sed/manual/sed.html#Addresses
http://www.gnu.org/software/sed/manual/sed.html#Addresses 上的信息
回答by alinsoar
sed '/^string1/ { s,string2,string3, }' file
This will replace string2 with string3 on all the lines that start with string1.
这将在所有以 string1 开头的行上用 string3 替换 string2。
回答by kbekkouche
You can do simply this :
你可以简单地这样做：
sed -ri 's/sqlite/mysql/g' YOURFILE
回答by AstraSerg
If you want to change an entire line which starts with a pattern and ends with enything else, you can use command cdescriptionExample
如果要更改以模式开头并以其他任何内容结尾的整行，可以使用命令cdescriptionExample
sed -i '/^connection = sqlite/c\connection = mysql://keystone:[email protected]/keystone' your_file
