# change waiting time in systemd-network-wait-online

###### tags: `linux` `network`

### ubuntu 18.04

Edit /etc/systemd/system/network-online.target.wants/systemd-networkd-wait-online.service
Add --timeout option with seconds value to wait.

Example:
ycheng@ycheng:/etc/systemd/system/network-online.target.wants$ cat ./systemd-networkd-wait-online.service
#  SPDX-License-Identifier: LGPL-2.1+
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Wait for Network to be Configured
Documentation=man:systemd-networkd-wait-online.service(8)
DefaultDependencies=no
Conflicts=shutdown.target
Requires=systemd-networkd.service
After=systemd-networkd.service
Before=network-online.target shutdown.target

[Service]
Type=oneshot
ExecStart=/lib/systemd/systemd-networkd-wait-online --timeout=10
RemainAfterExit=yes

[Install]
WantedBy=network-online.target


root@nuc:~# cat /etc/systemd/system/network-online.target.wants/NetworkManager-wait-online.service
[Unit]
Description=Network Manager Wait Online
Documentation=man:nm-online(1)
Requires=NetworkManager.service
After=NetworkManager.service
Before=network-online.target

[Service]
Type=oneshot
ExecStart=/usr/bin/nm-online -s -q --timeout=30
RemainAfterExit=yes

[Install]
WantedBy=network-online.target

### another example

root@develop:~# vim /lib/systemd/system/systemd-networkd-wait-online.service


#  SPDX-License-Identifier: LGPL-2.1+
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Wait for Network to be Configured
Documentation=man:systemd-networkd-wait-online.service(8)
DefaultDependencies=no
Conflicts=shutdown.target
Requires=systemd-networkd.service
After=systemd-networkd.service
Before=network-online.target shutdown.target

[Service]
Type=oneshot
#ExecStart=/lib/systemd/systemd-networkd-wait-online --timeout=30
#ExecStart=/lib/systemd/systemd-networkd-wait-online --timeout=10
ExecStart=/lib/systemd/systemd-networkd-wait-online --interface=ens3 --ignore=ens9 --timeout=10
RemainAfterExit=yes

[Install]
WantedBy=network-online.target


!!! After edited configure file. run "systemctl daemon-reload" to reload units.
=================================================================
root@develop:/etc/systemd/system# /lib/systemd/systemd-networkd-wait-online --help
systemd-networkd-wait-online [OPTIONS...]

Block until network is configured.

  -h --help                 Show this help
     --version              Print version string
  -q --quiet                Do not show status information
  -i --interface=INTERFACE  Block until at least these interfaces have appeared
     --ignore=INTERFACE     Don't take these interfaces into account
     --timeout=SECS         Maximum time to wait for network connectivity
     
Ref:
https://github.com/systemd/systemd/blob/master/src/network/wait-online/wait-online.c