Replace whole line containing a string using Sed

I have a text file which has a particular line something like

sometext sometext sometext TEXT_TO_BE_REPLACED sometext sometext sometext

I need to replace the whole line above with

This line is removed by the admin.

The search keyword is TEXT_TO_BE_REPLACED

I need to write a shell script for this. How can I achieve this using sed ?

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You can use the change command to replace the entire line, and the -i flag to make the changes in-place. For example, using GNU sed:

sed -i '/TEXT_TO_BE_REPLACED/cThis line is removed by the admin.' /tmp/foo

Note: on OSX you need to install "brew install gnu-sed --with-default-names" to support GNU style -i command

---

您需要在前后使用通配符（ .* ）来替换整行：

sed 's/.*TEXT_TO_BE_REPLACED.*/This line is removed by the admin./'

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The accepted answer did not work for me for several reasons:

my version of sed does not like -i with a zero length extension

the syntax of the c command is weird and I couldn't get it to work

I didn't realize some of my issues are coming from unescaped slashes

So here is the solution I came up with which I think should work for most cases:

function escape_slashes {
    sed 's/////g' 
}

function change_line {
    local OLD_LINE_PATTERN=$1; shift
    local NEW_LINE=$1; shift
    local FILE=$1

    local NEW=$(echo "${NEW_LINE}" | escape_slashes)
    sed -i .bak '/'"${OLD_LINE_PATTERN}"'/s/.*/'"${NEW}"'/' "${FILE}"
    mv "${FILE}.bak" /tmp/
}

So the sample usage to fix the problem posed:

change_line "TEXT_TO_BE_REPLACED" "This line is removed by the admin." yourFile

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