From 6e943a3808e5a11ef7869debac7c1a994790e64e Mon Sep 17 00:00:00 2001
From: Ein Verne <einverne@gmail.com>
Date: Sat, 20 Jun 2020 11:41:03 +0800
Subject: [PATCH] sponge: add page (#4117)

---
 pages/common/sponge.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 pages/common/sponge.md

diff --git a/pages/common/sponge.md b/pages/common/sponge.md
new file mode 100644
index 000000000..a39770986
--- /dev/null
+++ b/pages/common/sponge.md
@@ -0,0 +1,12 @@
+# sponge
+
+> Soak up the input before writing the output file.
+> More information: <https://linux.die.net/man/1/sponge>.
+
+- Append file content to the source file:
+
+`cat {{path/to/file}} | sponge -a {{path/to/file}}`
+
+- Remove all lines starting with # in a file:
+
+`grep -v '^{{#}}' {{path/to/file}} | sponge {{path/to/file}}`