docs/NETWORK_ONLINE: Use `until` instead of `while !`

`until` is the standard POSIX shell builtin to be used when waiting for
a condition to appear.

diff --git a/docs/NETWORK_ONLINE.md b/docs/NETWORK_ONLINE.md
index 74e610b0d1fb4edc08b077738e885d230097f72a..b249eb4402d4eec68913f51cbfd7ca6d15f185df 100644 (file)
--- a/docs/NETWORK_ONLINE.md
+++ b/docs/NETWORK_ONLINE.md
@@ -256,7 +256,7 @@ Before=network-online.target
 [Service]
 Type=oneshot
 RemainAfterExit=yes
-ExecStart=sh -c 'while ! ping -c 1 example.com; do sleep 1; done'
+ExecStart=sh -c 'until ping -c 1 example.com; do sleep 1; done'
 
 [Install]
 WantedBy=network-online.target