How can I suspend/hibernate from command line?

Traditionally ubuntu supported a fairly blunt method of suspend and hibernate. Neither would integrate well with other apps and sometimes not even work on some machines. This new method doesn't require root and notifies all applications listening for power events.

Systemd Method

Starting with Ubuntu 16.04, systemctl call must be used (See Suspend command in Ubuntu 16.04)

systemctl suspend

and

systemctl hibernate

New Method (obsolete)

Obsolete circa Ubuntu 16.04; use systemctl instead, as above.

See the answer here on this page from Adam Paetznick regarding the use of dbus. Ideally you would create a ~/bin/suspend shortcut/script that makes the use of this action easy.

For use over ssh, you should modify policykit rules as outlined by Peter V. Mørch

Old Method

According to the Ubuntu Forum you can use the following commands:

pmi action suspend

and

pmi action hibernate

This requires that you install the powermanagement-interface package (not tested).

sudo apt-get install powermanagement-interface

I have also found the commands sudo pm-suspend and sudo pm-hibernate to work on my netbook.

The gnome-friendly way is to use dbus.

dbus-send --system --print-reply \
    --dest="org.freedesktop.UPower" \
    /org/freedesktop/UPower \
    org.freedesktop.UPower.Suspend

There are two advantages to this command over pm-suspend.

1. It will lock your screen (upon resume) if you have that option selected in gnome.

2. It does not require root privilege, so it is easy to add it as a keyboard shortcut, for example.

As mentioned in the comments exchanging the Suspend in the last line to Hibernate creates a hibernate command:

dbus-send --system --print-reply \
    --dest="org.freedesktop.UPower" \
    /org/freedesktop/UPower \
    org.freedesktop.UPower.Hibernate

If the hibernation throws Error org.freedesktop.UPower.GeneralError: not authorized your user might not be allowed to hibernate. Edit or create /etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla so it contains the following section: (source)

[Re-enable hibernate by default]
Identity=unix-user:*
Action=org.freedesktop.upower.hibernate
ResultActive=yes

This was tested on UbuntuGnome 14.04.

Note: This is basically the same as qbi's answer, but updated to work for newer versions of Ubuntu as well as including hibernate.

English

If you want your computer to suspend in one hour because you want to go to bed listening to your favorite radio station, open terminal and type:

sudo bash -c "sleep 1h; pm-suspend"

and your computer will fall asleep in 1 hour. When you awake, it will have kept your open images and all your stuff.

You can replace 1h by what you want: h for hours, m for minutes, s for seconds, d for days.

Good night!

Français

Si vous voulez juste que votre ordinateur se mette en veille dans une heure parce que vous voulez vous endormir en ecoutant votre radio préférée, ouvrez Terminal et tapez :

sudo bash -c "sleep 1h; pm-suspend"

et votre ordinateur s'endormira dans une heure. Quand vous vous réveillerez, il aura conservé en mémoire vos applications ouvertes.

Vous pouvez remplacer 1h par ce que vous voulez: h pour les heures, m pour les minutes, s pour les secondes, d pour les jours.

Bonne nuit!

Español

Si quieres suspender tu computadora en una hora porque quieres ir a dormir escuchando tu estación de radio favorita, tan solo abre el terminal y escribe:

sudo bash -c "sleep 1h; pm-suspend"

y tu computadora se quedará dormida en 1 hora. Cuando despiertes, allí habrán quedado abiertas tus imágenes y todas tus cosas.

Puedes reemplazar 1h por lo que desees: h para horas, m para minutos, s para segundos, d para días.

¡Buenas noches!

To get Hibernation:

sudo pm-hibernate

To get Suspend:

sudo pm-suspend

You can use the file /sys/power/state to do this. First find out what states are supported:

user@linux:_> cat /sys/power/state
standby mem disk

root@linux:~> echo -n mem > /sys/power/state  # suspend to ram
root@linux:~> echo -n disk > /sys/power/state  # suspend to disk

or via dbus:

According to this entry in launchpad the above interface was removed. So it would not work anymore in Ubuntu.

since 15.04 systemD is the standard init system so there is a new command to be used:

systemctl suspend

To suspend a system (14.04) from the command line (or keyboard shortcut) use:

dbus-send --system --print-reply --dest="org.freedesktop.login1" /org/freedesktop/login1 org.freedesktop.login1.Manager.Suspend boolean:true

I found this out by playing around with gdbus which can list the interfaces available:

To list the services available on the bus:

dbus-send --system --dest=org.freedesktop.DBus --type=method_call --print-reply /org/freedesktop/DBus org.freedesktop.DBus.ListNames

To find the methods:

gdbus introspect --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --recurse

Adam Paetznick's dbus-send answer didn't work as purported for me on lucid; the machine woke up unlocked, even though the gnome-power-manager is set to lock the screen on wake-up. I want the screen to be locked at wake-up, and found that the following does that:

$ gnome-screensaver-command --lock && pmi action hibernate

I imagine this does not depend on the gnome configuration, but I haven't tested that.

New interface

…which works in 15.10 Wily, and possibly Utopic and Vivid.

dbus-send --print-reply --system                         \
    --dest=org.freedesktop.login1                        \
    /org/freedesktop/login1                              \
    org.freedesktop.login1.Manager.Suspend boolean:true

Helpfully this doesn't require sudo, unlike the pm-suspend command.

Here's how to put a remote machine in standby over ssh:

ssh -t 192.168.1.4 'sudo nohup &>/dev/null bash -c "(sleep 1; echo -n mem >/sys/power/state) &"'
[email protected]'s password: 
[sudo] password for x: 
Connection to 192.168.1.4 closed.

/sys/power/state works in Ubuntu 13.10. pmi gives Dbus error.