This file is indexed.

/usr/share/irssi/help/unban is in irssi 0.8.17-1+deb8u5.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
%9Syntax:%9

UNBAN %|-first | -last | <id> | <masks>

%9Parameters:%9

    -normal:    Uses the *!*user@*.domain.tld format.
    -user:      Uses the *!*user@* format.
    -host:      Uses the *!*@host.domain.tld format.
    -domain:    Uses the *!*@*.domain.tld format.
    -custom:    Uses the custom format.
    -first:     Removes the first ban from the list.
    -last:      Removes the last ban from the list.

    A channel and the nicknames, hostnames or ban identifier to unban; if no
    channel is given, the active channel will be used.

    If no ban format parameter is given, the value of the ban_type setting will
    be used to generate the hostmask to ban.

%9Description:%9

    Removes one or more bans from a channel.

%9Configuring the custom format:%9

    You must set the custom ban_type to the format you would like to use. For
    example, if you set the custom ban_type to 'nick domain', it will generate
    a ban based on the nick!*@*.domain.tld format.

%9Examples:%9

    /UNBAN mike
    /UNBAN -host bob
    /UNBAN *!*@*.irssi.org
    /UNBAN *!*@*.users.irssi.org *!*@*.staff.irssi.org
    /UNBAN -first
    /UNBAN 5

    /SET ban_type custom nick domain
    /SET ban_type custom user host

%9See also:%9 BAN, DEOP, KICKBAN, KNOCKOUT, OP