col: add page (#19237)

Co-authored-by: zhuhongboAAA <[email protected]>
Co-authored-by: Managor <[email protected]>

Author: zhb4

pages/linux/col.md

@@ -0,0 +1,28 @@
+# col
+
+> Filter reverse line feeds from input.
+> More information: <https://manned.org/col>.
+
+- Filter reverse line feeds from input:
+
+`{{command}} | col`
+
+- Filter reverse line feeds and output with spaces instead of tabs:
+
+`{{command}} | col {{[-x|--spaces]}}`
+
+- Remove backspaces, output only the last character written to each position:
+
+`{{command}} | col {{[-b|--no-backspaces]}}`
+
+- Specify a buffer size with a specific number of lines:
+
+`{{command}} | col {{[-l|--lines]}} {{num}}`
+
+- Format a manual page for viewing with `less`:
+
+`man ls | col {{[-b|--no-backspaces]}} | less`
+
+- Process a file with reverse line feeds and save the cleaned output:
+
+`cat {{path/to/input_file}} | col {{[-x|--spaces]}} > {{output_file}}`