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Regex for PCRE, grep, ripgrep, and sed/sed regex replacement

Replace all runs of whitespace with a single space.

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Section: grep, egrep, and ripgrep

sed regex replacement

bash
bash
sed -E 's/[[:space:]]+/ /g' file.txt
Explanation

Great for one-line normalization tasks.

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Related commands

Same sheet · prioritizing grep, egrep, and ripgrep
grep whole word
Find full-word matches in files.
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ripgrep ignore case
Search recursively with ripgrep case-insensitively.
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ripgrep with PCRE2
Use lookbehind or advanced features through PCRE2 mode.
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Invert match
Show lines that do not match a pattern.
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Alternation in egrep style
Search for one of several tokens.
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awk regex condition
Print lines matching a regex in awk.
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