<para><filename>systemd-halt.service</filename> is a
system service that is pulled in by
<filename>halt.target</filename> and is responsible
- for the actual system halt. Similar,
+ for the actual system halt. Similarly,
<filename>systemd-poweroff.service</filename> is
pulled in by <filename>poweroff.target</filename>,
<filename>systemd-reboot.service</filename> by
<para>It is necessary to have this code in a separate binary
because otherwise rebooting after an upgrade might be broken —
the running PID 1 could still depend on libraries which are not
- available any more, thus keeping the filesystem busy, which
+ available any more, thus keeping the file system busy, which
then cannot be re-mounted read-only.</para>
<para>Immediately before executing the actual system