update user admin password:

/user set admin password=mypassword

mikrotik distribution channels are:

stable (former current)
long-term (former bugfix)
testing
development

change the current channel:

/system package update set channel=development

update router os:

/system package update download

update router firmware:

/system routerboard upgrade

search for file on routeros:

/file print where name~".npk"

change ssh port: /ip service set ssh port=5000

timeclock

set timezone:

/system clock set time-zone-name=America/Puerto_Rico

update clock with ntp:

/system ntp client set enabled=yes primary-ntp=0.0.0.0 secondary-ntp=0.0.0.0 server-dns-names=us.pool.ntp.org

Howto mikrotik