| Removal | |
|---|---|
Delete shortest match of needle from front of haystack |
${haystack#needle} |
Delete longest match of needle from front of haystack |
${haystack##needle} |
Delete shortest match of needle from back of haystack |
${haystack%needle} |
Delete longest match of needle from back of haystack |
${haystack%%needle} |
| Replacement | |
Replace first match of needle with replacement from haystack |
${haystack/needle/replacement} |
Replace all matches of needle with replacement from haystack |
${haystack//needle/replacement} |
If needle matches front of haystack replace with replacement |
${haystack/#needle/replacement} |
If needle matches back of haystack replace with replacement |
${haystack/%needle/replacement} |
| Substitution | |
If variable not set, return value, else variable |
${variable-value} |
If variable not set or empty, return value, else variable |
${variable:-value} |
If variable set, return value, else null string |
${variable+value} |
If variable set and not empty, return value, else null string |
${variable:+value} |
| Extraction | |
Extract length characters from variable starting at position |
${variable:position:length} |
String length of variable |
${#variable} |
-
-
Save SimpleJian/09151053971b4df8ad1fa5b4532da458 to your computer and use it in GitHub Desktop.
Bash string manipulation cheatsheet.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment