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--- deb12:tofix [2025/10/02 13:25] – created Bernard Condrau
+++ deb12:tofix [2025/10/02 14:33] (current) – [NUT for APC SRV1K] Bernard Condrau
@@ Line 1: / Line 1: @@
 ====== To Fix ======
+===== Wait for network =====
+google: linux bash does not recognize when network comes up
+  * use ping<code>#!/bin/bash
+    TARGET_HOST="8.8.8.8"
+    while ! ping -c 1 "$TARGET_HOST" &> /dev/null; do
+        echo "Waiting for network connectivity..."
+        sleep 5 # Wait 5 seconds before retrying
+    done
+    echo "Network is up! Continuing with script..."
+    # Your network-dependent commands here
+</code>
+  * check network interface state<code>#!/bin/bash
+    INTERFACE="eth0" # Replace with your actual interface name
+    while [[ $(</sys/class/net/${INTERFACE}/operstate) != "up" ]]; do
+        echo "Waiting for interface $INTERFACE to be up..."
+        sleep 5
+    done
+    echo "Interface $INTERFACE is up! Continuing with script..."
+    # Your network-dependent commands here
+</code>
+google: linux interface up when no router
+===== NUT for APC SRV1K =====
+  * [[https://networkupstools.org/docs/man/huawei-ups2000.html|HUAWEI-UPS2000(8)]]
+  * google "nut with qinheng electronics ch341"
+  * ''systemctl reload nut-server''
+  * google "nut driver not connected"
+  * google "how to create driver for nut in debian 12"

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