atool: add page (#6901)

pages/linux/atool.md

@@ -0,0 +1,20 @@
+# atool
+
+> Manage archives of various formats.
+> More information: <https://www.nongnu.org/atool/>.
+
+- List files in a zip archive:
+
+`atool --list {{path/to/archive.zip}}`
+
+- Unpack a tar.gz archive into a new subdirectory (or current directory if it contains only one file):
+
+`atool --extract {{path/to/archive.tar.gz}}`
+
+- Create a new 7zip archive with two files:
+
+`atool --add {{path/to/archive.7z}} {{path/to/file1}} {{path/to/file2}}`
+
+- Extract all zip and rar archives in the current directory:
+
+`atool --each --extract {{*.zip}} {{*.rar}}`