Update README.md

bonifield · Aug 31, 2021 · 78228c7 · 78228c7
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commit 78228c7
Showing 1 changed file with 22 additions and 0 deletions.
diff --git a/bash/README.md b/bash/README.md
@@ -26,3 +26,25 @@
 | $HOSTNAME | machine hostname |
 | $RANDOM | a random number |
 | $LINENO | current line number |
+
+---
+
+| Operator | True If |
+| --- | --- |
+| !EXPRESSION | The EXPRESSION is false. |
+| -n STRING | STRING length is greater than zero |
+| -z STRING | The length of STRING is zero (empty) |
+| STRING1 != STRING2 | STRING1 is not equal to STRING2 |
+| STRING1 = STRING2 | STRING1 is equal to STRING2 |
+| INTEGER1 -eq INTEGER2 | INTEGER1 is equal to INTEGER2 |
+| INTEGER1 -ne INTEGER2 | INTEGER1 is not equal to INTEGER2 |
+| INTEGER1 -gt INTEGER2 | INTEGER1 is greater than INTEGER2 |
+| INTEGER1 -lt INTEGER2 | INTEGER1 is less than INTEGER2 |
+| INTEGER1 -ge INTEGER2 | INTEGER1 is greater than or equal to INTEGER 2 |
+| INTEGER1 -le INTEGER2 | INTEGER1 is less than or equal to INTEGER 2 |
+| -d FILE | FILE exists and is a directory |
+| -e FILE | FILE exists |
+| -r FILE | FILE exists and has read permission |
+| -s FILE | FILE exists and it is not empty |
+| -w FILE | FILE exists and has write permission |
+| -x FILE | FILE exists and has execute permission |