On Wed, 11 Jul 2018 22:39:47 -0400, lefty wrote:
>Do all processes start in /tmp?
No, /tmp is a directory mainly used by user session specific processes.
Depending on how you or your distros installer set up your Linux /tmp
is a tmpfs, IOW it's used RAM, not drive space.
[rocketmouse@archlinux ~]$ lsof | grep /tmp/
dbus-daem 779 rocketmouse 5u unix 0x00000000ee21ecbc
0t0 20991 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 8u unix 0x000000002a45c64b
0t0 20996 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 9u unix 0x00000000886c5a99
0t0 21027 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 10u unix 0x000000005433d3d3
0t0 136996 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 11u unix 0x00000000d0730f30
0t0 21231 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 12u unix 0x0000000084c05853
0t0 21611 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 13u unix 0x000000006b42e0f4
0t0 137938 @/tmp/dbus-ZVZg81Bcrj type=STREAM
dbus-daem 779 rocketmouse 14u unix 0x0000000028de1d00
0t0 288171 @/tmp/dbus-ZVZg81Bcrj type=STREAM
claws-mai 4848 rocketmouse 4u unix 0x00000000240a3e76
0t0 137873 /tmp/claws-mail-1000/d50dca64f26ba118a25bee02366fef2f
type=STREAM
gksudo 4917 rocketmouse 6w REG 0,45
54 137063 /tmp/libgksu-vuJooy/.Xauthority
roxterm 26398 rocketmouse 10u REG 0,45
2162688 288210 /tmp/#288210 (deleted)
roxterm 26398 rocketmouse 11u REG 0,45
393216 288211 /tmp/#288211 (deleted)
roxterm 26398 26399 gmain rocketmouse 10u REG 0,45
2162688 288210 /tmp/#288210 (deleted)
roxterm 26398 26399 gmain rocketmouse 11u REG 0,45
393216 288211 /tmp/#288211 (deleted)
[rocketmouse@archlinux ~]$ df -h | grep tmpfs
tmpfs 3.9G 4.0K 3.9G 1% /dev/shm
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
tmpfs 3.9G 364K 3.9G 1% /tmp
tmpfs 786M 60K 786M 1% /run/user/1000
>Is systemd drunk?
No, systemd has got pros and cons, but what you experience is not
caused by systemd. As already pointed out by the smartmontools example,
it's Ubuntu's policy to start the service. It doesn't matter if the
init system is systemd or anything else, e.g. upstart. If you install
the package smartmontools you need to disable smartd, if you don't want
that it does run, since Ubuntu's policy says so. If you run Arch Linux,
it's vice versa, a user needs to enable smartd and similar things.
It's good practise to read and compare the distros' policies before
using a distro.
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