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fixed example for Variable command

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bonnie 2022-05-08 23:33:28 +08:00
parent 7d40456576
commit bab726081b
1 changed files with 5 additions and 3 deletions
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@ -188,11 +188,13 @@ echo ${var[@]#0}
```bash ```bash
{var//a/,} {var//a/,}
``` ```
##### Grep lines with strings from a file (e.g. lines with 'stringA or 'stringB' or 'stringC')
```bash ```bash
#with grep #with grep
test="god the father" test="stringA stringB stringC"
grep ${test// /\\\|} file.txt grep ${test// /\\\|} file.txt
# turning the space into 'or' (\|) in grep # turning the space into 'or' (\|) in grep
``` ```
##### To change the case of the string stored in the variable to lowercase (Parameter Expansion) ##### To change the case of the string stored in the variable to lowercase (Parameter Expansion)