Apparently, at some point the syntax for using
adb backup changed and it’s not really well documented…
This is how I backed up my Android phone with
adb backup -f mybackup.bkp '-apk -obb -shared -all -system'
While before you would launch your backup with:
adb backup -f oldbackup.bkp -apk -obb -shared -all -system
Notice the lack of quotes in the old version.
I rarely use
at, but today I shut down
crond to do some maintenance and I wanted to schedule an automatic restart for later in the day in case I forget to restart it manually.
So, I ran:
# echo "/usr/bin/service crond start" | at now +6 hours
-bash: at: command not found
Turns out, on systems running systemd you can use
systemd-run as a substitute to
at to schedule one-time jobs, like this:
# systemd-run --on-active=30 /bin/touch /tmp/foo
--on-active parameter is in seconds, but you can pass modifiers to make it more readable:
# systemd-run --on-active="4h 30m" /bin/touch /tmp/foo
If you need to restart a service, there’s a handy shortcut, the
# systemd-run --on-active=6h --unit crond.service
You can check the job queue (sorta what you would have done with
# systemctl list-timers
NEXT LEFT LAST PASSED UNIT ACTIVATES
gio 2018-06-07 16:32:01 CEST 5h 18min left mer 2018-06-06 16:32:01 CEST 18h ago systemd-tmpfiles-clean.timer systemd-tmpfiles-clean.service
gio 2018-06-07 17:12:12 CEST 7h left n/a n/a crond.timer crond.service
Another poor service (
atd) has been swallowed by systemd. RIP.