问题：rabbitmq的管理员密码忘掉了无法登录到管理界面
解决：
直接使用rabbitmqctl
这个命令与管理界面的功能基本相同，或者可以说管理界面就是对rabbitmqctl的图形化扩展。
使用示例：
rabbitmqctl add_vhost test_host
rabbitmqctl set_permissions -p test_host root ".*" ".*" ".*"
以下为rabbitmqctl的自我介绍
Usage:
rabbitmqctl [-n <node>] [-t <timeout>] [-q] <command> [<command options>]
Options:
-n node
-q
-t timeout
Default node is "rabbit@server", where server is the local host. On a host
named "server.example.com", the node name of the RabbitMQ Erlang node will
usually be rabbit@server (unless RABBITMQ_NODENAME has been set to some
non-default value at broker startup time). The output of hostname -s is usually
the correct suffix to use after the "@" sign. See rabbitmq-server(1) for
details of configuring the RabbitMQ broker.
Quiet output mode is selected with the "-q" flag. Informational messages are
suppressed when quiet mode is in effect.
Operation timeout in seconds. Only applicable to "list" commands. Default is
"infinity".
Commands:
stop [<pid_file>]
shutdown
stop_app
start_app
wait <pid_file>
reset
force_reset
rotate_logs <suffix>
hipe_compile <directory>
join_cluster <clusternode> [--ram]
cluster_status
change_cluster_node_type disc | ram
forget_cluster_node [--offline]
rename_cluster_node oldnode1 newnode1 [oldnode2] [newnode2 ...]
update_cluster_nodes clusternode
force_boot
sync_queue [-p <vhost>] queue
cancel_sync_queue [-p <vhost>] queue
purge_queue [-p <vhost>] queue
set_cluster_name name
add_user <username> <password>
delete_user <username>
change_password <username> <newpassword>
clear_password <username>
authenticate_user <username> <password>
set_user_tags <username> <tag> ...
list_users
add_vhost <vhost>
delete_vhost <vhost>
list_vhosts [<vhostinfoitem> ...]
set_permissions [-p <vhost>] <user> <conf> <write> <read>
clear_permissions [-p <vhost>] <username>
list_permissions [-p <vhost>]
list_user_permissions <username>
set_parameter [-p <vhost>] <component_name> <name> <value>
clear_parameter [-p <vhost>] <component_name> <key>
list_parameters [-p <vhost>]
set_global_parameter <name> <value>
clear_global_parameter <name>
list_global_parameters
set_policy [-p <vhost>] [--priority <priority>] [--apply-to <apply-to>]
<name> <pattern> <definition>
clear_policy [-p <vhost>] <name>
list_policies [-p <vhost>]
list_queues [-p <vhost>] [--offline|--online|--local] [<queueinfoitem> ...]
list_exchanges [-p <vhost>] [<exchangeinfoitem> ...]
list_bindings [-p <vhost>] [<bindinginfoitem> ...]
list_connections [<connectioninfoitem> ...]
list_channels [<channelinfoitem> ...]
list_consumers [-p <vhost>]
status
node_health_check
environment
report
eval <expr>
close_connection <connectionpid> <explanation>
trace_on [-p <vhost>]
trace_off [-p <vhost>]
set_vm_memory_high_watermark <fraction>
set_vm_memory_high_watermark absolute <memory_limit>
set_disk_free_limit <disk_limit>
set_disk_free_limit mem_relative <fraction>
encode [--decode] [<value>] [<passphrase>] [--list-ciphers] [--list-hashes]
[--cipher <cipher>] [--hash <hash>] [--iterations <iterations>]
decode [<value>] [<passphrase>][--cipher <cipher>] [--hash <hash>]
[--iterations <iterations>]
list_hashes
list_ciphers
<vhostinfoitem> must be a member of the list [name, tracing].
The list_queues, list_exchanges and list_bindings commands accept an optional
virtual host parameter for which to display results. The default value is "/".
<queueinfoitem> must be a member of the list [name, durable, auto_delete,
arguments, policy, pid, owner_pid, exclusive, exclusive_consumer_pid,
exclusive_consumer_tag, messages_ready, messages_unacknowledged, messages,
messages_ready_ram, messages_unacknowledged_ram, messages_ram,
messages_persistent, message_bytes, message_bytes_ready,
message_bytes_unacknowledged, message_bytes_ram, message_bytes_persistent,
head_message_timestamp, disk_reads, disk_writes, consumers,
consumer_utilisation, memory, slave_pids, synchronised_slave_pids, state].
<exchangeinfoitem> must be a member of the list [name, type, durable,
auto_delete, internal, arguments, policy].
<bindinginfoitem> must be a member of the list [source_name, source_kind,
destination_name, destination_kind, routing_key, arguments].
<connectioninfoitem> must be a member of the list [pid, name, port, host,
peer_port, peer_host, ssl, ssl_protocol, ssl_key_exchange, ssl_cipher,
ssl_hash, peer_cert_subject, peer_cert_issuer, peer_cert_validity, state,
channels, protocol, auth_mechanism, user, vhost, timeout, frame_max,
channel_max, client_properties, recv_oct, recv_cnt, send_oct, send_cnt,
send_pend, connected_at].
<channelinfoitem> must be a member of the list [pid, connection, name, number,
user, vhost, transactional, confirm, consumer_count, messages_unacknowledged,
messages_uncommitted, acks_uncommitted, messages_unconfirmed, prefetch_count,
global_prefetch_count].