Skip to content

Instantly share code, notes, and snippets.

@wolfeidau

wolfeidau/ninjablock_debugging.md

Last active December 16, 2015 17:40
Show Gist options

  • Select an option

    Learn more about clone URLs
  • Save wolfeidau/5472154 to your computer and use it in GitHub Desktop.

Select an option

Learn more about clone URLs
Save wolfeidau/5472154 to your computer and use it in GitHub Desktop.
Download ZIP
Ninja Block debugging
Raw
ninjablock_debugging.md

#Ninja Block Debugging

I am building a list of handy commands which I use to work out what the hell my block is doing.

Prerequisites

This is a list of handy system tools i install on my block.

sudo apt-get install lsof

Handy Status Commands

This lists iterates through all the running node processes and dumps a list of there open file handles.

pi@ninjablock ~ $ for i in `pgrep node`; do echo "PID $i"; sudo lsof -p $i; echo; done
PID 1508
COMMAND  PID USER   FD   TYPE     DEVICE SIZE/OFF  NODE NAME
node    1508 root  cwd    DIR      179,2     4096     2 /
node    1508 root  rtd    DIR      179,2     4096     2 /
node    1508 root  txt    REG      179,2  9187989 28432 /usr/bin/nodejs
node    1508 root  mem    REG      179,2   116462  8423 /lib/arm-linux-gnueabihf/libpthread-2.13.so
node    1508 root  mem    REG      179,2   427628  8453 /lib/arm-linux-gnueabihf/libm-2.13.so
node    1508 root  mem    REG      179,2     9812  8449 /lib/arm-linux-gnueabihf/libdl-2.13.so
node    1508 root  mem    REG      179,2   126236  8425 /lib/arm-linux-gnueabihf/ld-2.13.so
node    1508 root  mem    REG      179,2    26632  8411 /lib/arm-linux-gnueabihf/librt-2.13.so
node    1508 root  mem    REG      179,2   131372  1171 /lib/arm-linux-gnueabihf/libgcc_s.so.1
node    1508 root  mem    REG      179,2     7332 30213 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
node    1508 root  mem    REG      179,2   780392 10302 /usr/lib/arm-linux-gnueabihf/libstdc++.so.6.0.17
node    1508 root  mem    REG      179,2  1187952  8437 /lib/arm-linux-gnueabihf/libc-2.13.so
node    1508 root    0u   CHR        5,1      0t0  1655 /dev/console
node    1508 root    1u   CHR        5,1      0t0  1655 /dev/console
node    1508 root    2u   CHR        5,1      0t0  1655 /dev/console
node    1508 root    3u  0000        0,9        0  1266 anon_inode
node    1508 root    4u  0000        0,9        0  1266 anon_inode
node    1508 root    5r  FIFO        0,8      0t0  3949 pipe
node    1508 root    6w  FIFO        0,8      0t0  3949 pipe
node    1508 root    7u  IPv4       3951      0t0   TCP *:http (LISTEN)
node    1508 root    8u  unix 0xcab29e40      0t0  3952 socket

PID 1509
COMMAND  PID USER   FD   TYPE     DEVICE SIZE/OFF  NODE NAME
node    1509 root  cwd    DIR      179,2     4096     2 /
node    1509 root  rtd    DIR      179,2     4096     2 /
node    1509 root  txt    REG      179,2  9188613 89997 /usr/local/bin/node
node    1509 root  mem    REG      179,2   116462  8423 /lib/arm-linux-gnueabihf/libpthread-2.13.so
node    1509 root  mem    REG      179,2     9812  8449 /lib/arm-linux-gnueabihf/libdl-2.13.so
node    1509 root  mem    REG      179,2   126236  8425 /lib/arm-linux-gnueabihf/ld-2.13.so
node    1509 root  mem    REG      179,2    26632  8411 /lib/arm-linux-gnueabihf/librt-2.13.so
node    1509 root  mem    REG      179,2   780392 10302 /usr/lib/arm-linux-gnueabihf/libstdc++.so.6.0.17
node    1509 root  mem    REG      179,2   131372  1171 /lib/arm-linux-gnueabihf/libgcc_s.so.1
node    1509 root  mem    REG      179,2     7332 30213 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
node    1509 root  mem    REG      179,2   427628  8453 /lib/arm-linux-gnueabihf/libm-2.13.so
node    1509 root  mem    REG      179,2  1187952  8437 /lib/arm-linux-gnueabihf/libc-2.13.so
node    1509 root    0r   CHR        1,3      0t0  1654 /dev/null
node    1509 root    1w   CHR        1,3      0t0  1654 /dev/null
node    1509 root    2w   CHR        1,3      0t0  1654 /dev/null
node    1509 root    3u  0000        0,9        0  1266 anon_inode
node    1509 root    4u  0000        0,9        0  1266 anon_inode
node    1509 root    5r  FIFO        0,8      0t0  3950 pipe
node    1509 root    6w  FIFO        0,8      0t0  3950 pipe
node    1509 root    7u  unix 0xcb9f3580      0t0  4024 /root/.forever/sock/worker.1367047826773qr9.sock
node    1509 root    8u  unix 0xcab29040      0t0  4016 socket
node    1509 root    9u  unix 0xcb9f3e40      0t0  4017 socket
node    1509 root   11u  unix 0xcb9f3900      0t0  4019 socket

PID 1510
COMMAND  PID USER   FD   TYPE     DEVICE SIZE/OFF  NODE NAME
nodejs  1510 root  cwd    DIR      179,2     4096     2 /
nodejs  1510 root  rtd    DIR      179,2     4096     2 /
nodejs  1510 root  txt    REG      179,2  9187989 28432 /usr/bin/nodejs
nodejs  1510 root  mem    REG      179,2   126236  8425 /lib/arm-linux-gnueabihf/ld-2.13.so
nodejs  1510 root  mem    REG      179,2    26632  8411 /lib/arm-linux-gnueabihf/librt-2.13.so
nodejs  1510 root  mem    REG      179,2     9812  8449 /lib/arm-linux-gnueabihf/libdl-2.13.so
nodejs  1510 root  mem    REG      179,2   780392 10302 /usr/lib/arm-linux-gnueabihf/libstdc++.so.6.0.17
nodejs  1510 root  mem    REG      179,2     7332 30213 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
nodejs  1510 root  mem    REG      179,2   427628  8453 /lib/arm-linux-gnueabihf/libm-2.13.so
nodejs  1510 root  mem    REG      179,2   131372  1171 /lib/arm-linux-gnueabihf/libgcc_s.so.1
nodejs  1510 root  mem    REG      179,2   116462  8423 /lib/arm-linux-gnueabihf/libpthread-2.13.so
nodejs  1510 root  mem    REG      179,2  1187952  8437 /lib/arm-linux-gnueabihf/libc-2.13.so
nodejs  1510 root    0u   CHR        5,1      0t0  1655 /dev/console
nodejs  1510 root    1u   CHR        5,1      0t0  1655 /dev/console
nodejs  1510 root    2u   CHR        5,1      0t0  1655 /dev/console
nodejs  1510 root    3u  unix 0xcab29c80      0t0  3953 socket
nodejs  1510 root    4u  0000        0,9        0  1266 anon_inode
nodejs  1510 root    5u  0000        0,9        0  1266 anon_inode
nodejs  1510 root    6r  FIFO        0,8      0t0  3957 pipe
nodejs  1510 root    7w  FIFO        0,8      0t0  3957 pipe

PID 1523
COMMAND  PID USER   FD   TYPE     DEVICE SIZE/OFF  NODE NAME
node    1523 root  cwd    DIR      179,2     4096 74342 /opt/ninja
node    1523 root  rtd    DIR      179,2     4096     2 /
node    1523 root  txt    REG      179,2  9188613 89997 /usr/local/bin/node
node    1523 root  mem    REG      179,2     7376 67952 /lib/libnss_mdns4.so.2
node    1523 root  mem    REG      179,2    18780 78507 /opt/ninja/node_modules/upnode/node_modules/dnode/node_modules/weak/build/Release/weakref.node
node    1523 root  mem    REG      179,2   126236  8425 /lib/arm-linux-gnueabihf/ld-2.13.so
node    1523 root  mem    REG      179,2    23989 81033 /opt/ninja/drivers/platform/node_modules/serialport/build/Release/serialport.node
node    1523 root  mem    REG      179,2    26632  8411 /lib/arm-linux-gnueabihf/librt-2.13.so
node    1523 root  mem    REG      179,2   116462  8423 /lib/arm-linux-gnueabihf/libpthread-2.13.so
node    1523 root  mem    REG      179,2     9812  8449 /lib/arm-linux-gnueabihf/libdl-2.13.so
node    1523 root  mem    REG      179,2   427628  8453 /lib/arm-linux-gnueabihf/libm-2.13.so
node    1523 root  mem    REG      179,2   131372  1171 /lib/arm-linux-gnueabihf/libgcc_s.so.1
node    1523 root  mem    REG      179,2    42692  8419 /lib/arm-linux-gnueabihf/libnss_files-2.13.so
node    1523 root  mem    REG      179,2    18040  8439 /lib/arm-linux-gnueabihf/libnss_dns-2.13.so
node    1523 root  mem    REG      179,2     7332 30213 /usr/lib/arm-linux-gnueabihf/libcofi_rpi.so
node    1523 root  mem    REG      179,2   780392 10302 /usr/lib/arm-linux-gnueabihf/libstdc++.so.6.0.17
node    1523 root  mem    REG      179,2  1187952  8437 /lib/arm-linux-gnueabihf/libc-2.13.so
node    1523 root  mem    REG      179,2     7004 67953 /lib/libnss_mdns4_minimal.so.2
node    1523 root  mem    REG      179,2    71528  8429 /lib/arm-linux-gnueabihf/libresolv-2.13.so
node    1523 root    0u  unix 0xcb9f3c80      0t0  4015 socket
node    1523 root    1u  unix 0xcb9f3ac0      0t0  4018 socket
node    1523 root    2u  unix 0xcb9f3740      0t0  4020 socket
node    1523 root    3u  0000        0,9        0  1266 anon_inode
node    1523 root    4u  0000        0,9        0  1266 anon_inode
node    1523 root    5r  FIFO        0,8      0t0  4026 pipe
node    1523 root    6w  FIFO        0,8      0t0  4026 pipe
node    1523 root    7w   REG       0,18     2192  4027 /var/log/ninjablock.log
node    1523 root    8u  IPv4       4862      0t0   TCP ninjablock.local:57397->ec2-54-243-175-118.compute-1.amazonaws.com:https (ESTABLISHED)
node    1523 root    9u  IPv4       4028      0t0   TCP *:8000 (LISTEN)
node    1523 root   12r  0000        0,9        0  1266 anon_inode
pi@ninjablock ~ $
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment