This lists numerical signal values:
$ systemctl --signal list
SIGNAL NAME
1 SIGHUP
2 SIGINT
3 SIGQUIT
...
62 SIGRTMIN+28
63 SIGRTMIN+29
64 SIGRTMIN+30
This is useful when trying to kill e.g. systemd with a specific signal number
using kill. kill doesn't accept our fancy signal names like RTMIN+4, so one
would have to calculate that value somehow. Doing
systemctl --signal list | grep -F RTMIN+4
is a nice way of doing that.
Let's be a bit more helpful when refusing jobs on units that failed to
load properly. We already have explicit D-Bus errors for the error
conditions that are common and expected (such as "not found"), but for
the rest we so far generate a fairly cryptic message.
Let's try to be friendlier towards users and suggest what to do on such
errors.
Fixes: #16487
LLMNR/mDNS don't support DNSSEC, hence there's no point in routing any
lookups asking for DNSSEC there.
This speeds up looking up DNSSEC RRs for top-level domains, since we
don't have to wait for LLMNR to complete.
The flag is automatically set by kernel when the valid lifetime is
infinite. Note that the flag in netlink message for IPv4 address is
ignored. See set_ifa_lifetime() in kernel's net/ipv4/devinet.c.
But the flag is honored for IPv6 address. And if the flag is set with
finite valid lifetime, the address will not removed automatically by
the kernel.
If an address is assigned with IFA_F_MANAGETEMPADDR, then the flag must
be also set on remove. Otherwise, temporary addresses will not be
removed. See also inet6_rtm_deladdr() in kernel's net/ipv6/addrconf.c.
Fixes#13218.
