First, list all available button names using the following:
irrecord -l
Available names are as follows:
KEY_0
KEY_102ND
KEY_10CHANNELSDOWN
KEY_10CHANNELSUP
KEY_1
KEY_2
KEY_3
KEY_4
KEY_5
KEY_6
KEY_7
KEY_8
KEY_9
KEY_A
KEY_AB
KEY_ADDRESSBOOK
KEY_AGAIN
KEY_ALTERASE
KEY_ANGLE
KEY_APOSTROPHE
KEY_ARCHIVE
KEY_AUDIO
KEY_AUX
KEY_B
KEY_BACK
KEY_BACKSLASH
KEY_BACKSPACE
KEY_BASSBOOST
KEY_BATTERY
KEY_BLUE
KEY_BLUETOOTH
KEY_BOOKMARKS
KEY_BREAK
KEY_BRIGHTNESS_CYCLE
KEY_BRIGHTNESSDOWN
KEY_BRIGHTNESSUP
KEY_BRIGHTNESS_ZERO
KEY_BRL_DOT10
KEY_BRL_DOT1
KEY_BRL_DOT2
KEY_BRL_DOT3
KEY_BRL_DOT4
KEY_BRL_DOT5
KEY_BRL_DOT6
KEY_BRL_DOT7
KEY_BRL_DOT8
KEY_BRL_DOT9
KEY_C
KEY_CALC
KEY_CALENDAR
KEY_CAMERA
KEY_CANCEL
KEY_CAPSLOCK
KEY_CD
KEY_CHANNEL
KEY_CHANNELDOWN
KEY_CHANNELUP
KEY_CHAT
KEY_CLEAR
KEY_CLOSE
KEY_CLOSECD
KEY_COFFEE
KEY_COMMA
KEY_COMPOSE
KEY_COMPUTER
KEY_CONFIG
KEY_CONNECT
KEY_CONTEXT_MENU
KEY_COPY
KEY_CUT
KEY_CYCLEWINDOWS
KEY_D
KEY_DASHBOARD
KEY_DATABASE
KEY_DEL_EOL
KEY_DEL_EOS
KEY_DELETE
KEY_DELETEFILE
KEY_DEL_LINE
KEY_DIGITS
KEY_DIRECTION
KEY_DIRECTORY
KEY_DISPLAY_OFF
KEY_DISPLAYTOGGLE
KEY_DOCUMENTS
KEY_DOLLAR
KEY_DOT
KEY_DOWN
KEY_DVD
KEY_E
KEY_EDIT
KEY_EDITOR
KEY_EJECTCD
KEY_EJECTCLOSECD
KEY_EMAIL
KEY_END
KEY_ENTER
KEY_EPG
KEY_EQUAL
KEY_ESC
KEY_EURO
KEY_EXIT
KEY_F10
KEY_F11
KEY_F12
KEY_F13
KEY_F14
KEY_F15
KEY_F1
KEY_F16
KEY_F17
KEY_F18
KEY_F19
KEY_F20
KEY_F21
KEY_F22
KEY_F23
KEY_F24
KEY_F2
KEY_F
KEY_F3
KEY_F4
KEY_F5
KEY_F6
KEY_F7
KEY_F8
KEY_F9
KEY_FASTFORWARD
KEY_FAVORITES
KEY_FILE
KEY_FINANCE
KEY_FIND
KEY_FIRST
KEY_FN
KEY_FN_1
KEY_FN_2
KEY_FN_B
KEY_FN_D
KEY_FN_E
KEY_FN_ESC
KEY_FN_F
KEY_FN_F10
KEY_FN_F1
KEY_FN_F11
KEY_FN_F12
KEY_FN_F2
KEY_FN_F3
KEY_FN_F4
KEY_FN_F5
KEY_FN_F6
KEY_FN_F7
KEY_FN_F8
KEY_FN_F9
KEY_FN_S
KEY_FORWARD
KEY_FORWARDMAIL
KEY_FRAMEBACK
KEY_FRAMEFORWARD
KEY_FRONT
KEY_G
KEY_GAMES
KEY_GOTO
KEY_GRAPHICSEDITOR
KEY_GRAVE
KEY_GREEN
KEY_H
KEY_HANGEUL
KEY_HANJA
KEY_HELP
KEY_HENKAN
KEY_HIRAGANA
KEY_HOME
KEY_HOMEPAGE
KEY_HP
KEY_I
KEY_INFO
KEY_INSERT
KEY_INS_LINE
KEY_ISO
KEY_J
KEY_K
KEY_KATAKANA
KEY_KATAKANAHIRAGANA
KEY_KBDILLUMDOWN
KEY_KBDILLUMTOGGLE
KEY_KBDILLUMUP
KEY_KEYBOARD
KEY_KP0
KEY_KP1
KEY_KP2
KEY_KP3
KEY_KP4
KEY_KP5
KEY_KP6
KEY_KP7
KEY_KP8
KEY_KP9
KEY_KPASTERISK
KEY_KPCOMMA
KEY_KPDOT
KEY_KPENTER
KEY_KPEQUAL
KEY_KPJPCOMMA
KEY_KPLEFTPAREN
KEY_KPMINUS
KEY_KPPLUS
KEY_KPPLUSMINUS
KEY_KPRIGHTPAREN
KEY_KPSLASH
KEY_L
KEY_LANGUAGE
KEY_LAST
KEY_LEFT
KEY_LEFTALT
KEY_LEFTBRACE
KEY_LEFTCTRL
KEY_LEFTMETA
KEY_LEFTSHIFT
KEY_LINEFEED
KEY_LIST
KEY_LOGOFF
KEY_M
KEY_MACRO
KEY_MAIL
KEY_MAX
KEY_MEDIA
KEY_MEDIA_REPEAT
KEY_MEMO
KEY_MENU
KEY_MESSENGER
KEY_MHP
KEY_MINUS
KEY_MODE
KEY_MOVE
KEY_MP3
KEY_MSDOS
KEY_MUHENKAN
KEY_MUTE
KEY_N
KEY_NEW
KEY_NEWS
KEY_NEXT
KEY_NEXTSONG
KEY_NUMERIC_0
KEY_NUMERIC_1
KEY_NUMERIC_2
KEY_NUMERIC_3
KEY_NUMERIC_4
KEY_NUMERIC_5
KEY_NUMERIC_6
KEY_NUMERIC_7
KEY_NUMERIC_8
KEY_NUMERIC_9
KEY_NUMERIC_POUND
KEY_NUMERIC_STAR
KEY_NUMLOCK
KEY_O
KEY_OK
KEY_OPEN
KEY_OPTION
KEY_P
KEY_PAGEDOWN
KEY_PAGEUP
KEY_PASTE
KEY_PAUSE
KEY_PAUSECD
KEY_PC
KEY_PHONE
KEY_PLAY
KEY_PLAYCD
KEY_PLAYER
KEY_PLAYPAUSE
KEY_POWER
KEY_POWER2
KEY_PRESENTATION
KEY_PREVIOUS
KEY_PREVIOUSSONG
KEY_PRINT
KEY_PROG1
KEY_PROG2
KEY_PROG3
KEY_PROG4
KEY_PROGRAM
KEY_PROPS
KEY_PVR
KEY_Q
KEY_QUESTION
KEY_R
KEY_RADIO
KEY_RECORD
KEY_RED
KEY_REDO
KEY_REFRESH
KEY_REPLY
KEY_RESERVED
KEY_RESTART
KEY_REWIND
KEY_RFKILL
KEY_RIGHT
KEY_RIGHTALT
KEY_RIGHTBRACE
KEY_RIGHTCTRL
KEY_RIGHTMETA
KEY_RIGHTSHIFT
KEY_RO
KEY_S
KEY_SAT
KEY_SAT2
KEY_SAVE
KEY_SCALE
KEY_SCREEN
KEY_SCROLLDOWN
KEY_SCROLLLOCK
KEY_SCROLLUP
KEY_SEARCH
KEY_SELECT
KEY_SEMICOLON
KEY_SEND
KEY_SENDFILE
KEY_SETUP
KEY_SHOP
KEY_SHUFFLE
KEY_SLASH
KEY_SLEEP
KEY_SLOW
KEY_SOUND
KEY_SPACE
KEY_SPELLCHECK
KEY_SPORT
KEY_SPREADSHEET
KEY_STOP
KEY_STOPCD
KEY_SUBTITLE
KEY_SUSPEND
KEY_SWITCHVIDEOMODE
KEY_SYSRQ
KEY_T
KEY_TAB
KEY_TAPE
KEY_TEEN
KEY_TEXT
KEY_TIME
KEY_TITLE
KEY_TUNER
KEY_TV
KEY_TV2
KEY_TWEN
KEY_U
KEY_UNDO
KEY_UNKNOWN
KEY_UP
KEY_UWB
KEY_V
KEY_VCR
KEY_VCR2
KEY_VENDOR
KEY_VIDEO
KEY_VIDEO_NEXT
KEY_VIDEOPHONE
KEY_VIDEO_PREV
KEY_VOICEMAIL
KEY_VOLUMEDOWN
KEY_VOLUMEUP
KEY_W
KEY_WAKEUP
KEY_WIMAX
KEY_WLAN
KEY_WORDPROCESSOR
KEY_WWW
KEY_X
KEY_XFER
KEY_Y
KEY_YELLOW
KEY_YEN
KEY_Z
KEY_ZENKAKUHANKAKU
KEY_ZOOM
KEY_ZOOMIN
KEY_ZOOMOUT
KEY_ZOOMRESET
BTN_0
BTN_1
BTN_2
BTN_3
BTN_4
BTN_5
BTN_6
BTN_7
BTN_8
BTN_9
BTN_A
BTN_B
BTN_BACK
BTN_BASE
BTN_BASE2
BTN_BASE3
BTN_BASE4
BTN_BASE5
BTN_BASE6
BTN_C
BTN_DEAD
BTN_DIGI
BTN_EXTRA
BTN_FORWARD
BTN_GAMEPAD
BTN_GEAR_DOWN
BTN_GEAR_UP
BTN_JOYSTICK
BTN_LEFT
BTN_MIDDLE
BTN_MISC
BTN_MODE
BTN_MOUSE
BTN_PINKIE
BTN_RIGHT
BTN_SELECT
BTN_SIDE
BTN_START
BTN_STYLUS
BTN_STYLUS2
BTN_TASK
BTN_THUMB
BTN_THUMB2
BTN_THUMBL
BTN_THUMBR
BTN_TL
BTN_TL2
BTN_TOOL_AIRBRUSH
BTN_TOOL_BRUSH
BTN_TOOL_DOUBLETAP
BTN_TOOL_FINGER
BTN_TOOL_LENS
BTN_TOOL_MOUSE
BTN_TOOL_PEN
BTN_TOOL_PENCIL
BTN_TOOL_QUADTAP
BTN_TOOL_RUBBER
BTN_TOOL_TRIPLETAP
BTN_TOP
BTN_TOP2
BTN_TOUCH
BTN_TR
BTN_TR2
BTN_TRIGGER
BTN_WHEEL
BTN_X
BTN_Y
BTN_Z
Now, stop the LIRC service (irrecord cannot be used while the receiver is busy)
sudo systemctl stop eventlircd.service
Copy one of the existing files, eg.
cp /etc/lirc/wdtvlive-remote-lircd.conf ~/new-lirc.conf
Now, run through the learning process
irrecord -d /dev/lirc0 ~/new-lirc.conf
Start the service back up
sudo systemctl start eventlircd.service
Copy your customised file back to etc/lirc
sudo cp ~/new-lirc.conf /etc/lirc
Reboot to allow the service to run properly
reboot
Open My OSMC and set remote to the newly created conf file.
Done.