How to temporarily disable sleep and hibernate from the command line
It seems like there are many ways in which a Ubuntu's settings can be permanently manipulated to sleep when desired as long as predetermined conditions are met. However, these are more permanent solutions that don't take into account rare tasks that may want to temporarily fore go standard policy. The problem that I am running into is that I have a very long running script to do some backups and I don't want the computer to sleep or hibernate while that particular process is running which usually take 30-50 minutes. Therefore, is there a command that I could include into my backup script that would prevent the system from hibernating/sleeping while the backup script is running and is there also a command to restore the normal default power policy after the backup has finished?
something like
#!/usr/bin/bash
#disable normal powerpolicy
disable-power-policies
backup /dev/sda /dev/sdb /dev/fioa /dev/fiob
#enable power policies.
enable-power-policies
On Ubuntu 16.04 LTS, I successfully used the following to disable suspend:
sudo systemctl mask sleep.target suspend.target hibernate.target hybrid-sleep.target
And this to re-enable it:
sudo systemctl unmask sleep.target suspend.target hibernate.target hybrid-sleep.target
The most convenient way to do it temporarily is using systemd-inhibit:
systemd-inhibit CMD [...]
With no extra options, systemd-inhibit will execute CMD while temporarily disabling idle detection (that might auto suspend/hibernate the machine), explicit suspend/hibernate (e.g. you pressed the sleep key on the keyboard by accident) and shutdown commands.
You can use it to invoke your backup script like this:
systemd-inhibit ./my-backup-task.sh
I had the exact same problem last year for backups that took several hours!
You can try Keep.Awake https://launchpad.net/keep.awake It can monitor CPU load, network traffic and user activity for minimum thresholds.
I still haven't gotten around to creating a snap or deb for it. However temporarily you can download the program from Launchpad here
The current version is stable and works on all Ubuntu versions from 14.04 up to 16.04. That said I am continually improving it and will be adding new features.
It works like a proper command. Type --help to see a full listing of what can be done. The examples underneath are only a few:
./keepawake.py --help
To run interactively:
./keepawake.py
To run as a background service:
nohup ./keepawake.py -r > /dev/null 2>&1 &
To run as background service and set 15 min (900 sec) as the user activity idle time before it determines that the user is idle:
nohup ./keepawake.py -u 900 -r > /dev/null 2>&1 &
To run as background service and set minimum CPU load as 13%:
nohup ./keepawake.py -c 13 -r > /dev/null 2>&1 &
To run as background service and set minimum network traffic as 5KB (5120 bytes):
nohup ./keepawake.py -s 5120 -r > /dev/null 2>&1 &
To run all three settings above (network, CPU, User idle) in the one go:
nohup ./keepawake.py -s 5120 -c 13 -u 900 -r > /dev/null 2>&1 &
You can use gsettings in your script to disable automatic suspend in power settings and again restoring the default behavior of power setting.
Here is a simple configuration which first get the current timeout for sleep, disable it and after performing some task re-enable it.
#!/bin/bash
#get the current timeout for automatic suspend both for on battey power and when plugged in.
a=$(gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout)
b=$(gsettings get org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout)
#Disable automatic suspend
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0
#Your task here
sleep 5
#Enable the automatic suspend
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout $a
gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout $b