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sbliven/restartnet

Created January 27, 2021 21:12
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Restart the network (Ubuntu 20.04)
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restartnet
#!/bin/bash
# Restart the network
# usage: sudo restartnet [iface]
# Requires root
# Guess interface for outgoing traffic
TARGET=8.8.8.8 # known IP. Could also be 192.168.0.1 or similar for local networks
function guess_iface {
ip route get $TARGET | grep -Po '(?<=dev\s)\w+' | cut -f1 -d ' '
}
IFACE="${1:-$(guess_iface)}"
echo "Restarting $IFACE"
ifconfig "$IFACE" down
ifconfig "$IFACE" up
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sbliven commented Jan 27, 2021 •
edited

Sometimes after restarting my server uses the ISP's DNS server rather than its own internal bind9 service. This fixes it sometimes.

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