vault backup: 2025-04-26 13:14:25

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+---
+tags:
+  - bash
+  - howto
+---
+Process substitution connects the output of a command to a file. This enables a command to accept the output of multiple commands. 
+Useful with diff for example:
+
+```bash
+diff <(ls dirA) <(ls dirB)
+```
+
+> Important! Don't but the <() inside quotes.. it will report: cannot find file
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