---
tags: raspberry-pi
---
# ② ラズパイのInstall後の処理
# パッケージ更新
NOTE:
- コメントアウトの所はやってもいいが、怖いのでやらない。(mmal serviceの恐怖)
- Archみたいなローリング・リリースモデルじゃないんだから、わざｗざ更新する必要はない
```shell=
sudo apt update # package情報を最新にする
# sudo apt upgrade # packageを最新に
# sudo rpi-update # firmwareを最新に
sudo reboot
```
# VIMをデフォルトEDITORにする
```shell=
$ sudo apt install vim -y
$ sudo update-alternatives --config editor # vim.basic
```
https://askubuntu.com/questions/454649/how-can-i-change-the-default-editor-of-the-sudoedit-command-to-be-vim
# capslockの無効化
HHKBの場合は、fn + shift + tabでCAPSLOCKがかかってしまうため。
```shell
$ sudoedit /etc/default/keyboard
XKBOPTIONS="ctrl:nocaps"
```
ref https://l-w-i.net/t/raspbian/key_001.txt
# Docker周り
Dockerのインストール
```shell=
curl -sSL https://get.docker.com | sh
```
Pi UserのDockerへの追加
```shell=
sudo usermod -a -G docker pi
$ id pi
uid=1000(pi) gid=1000(pi) groups=1000(pi),4(adm),20(dialout),24(cdrom),27(sudo),29(audio),44(video),46(plugdev),60(games),100(users),105(input),109(netdev),999(spi),998(i2c),997(gpio),117(lpadmin),995(docker)
```
ggc_userのDockerへの追加
```shell=
$ sudo useradd -m ggc_user
$ # sudo mkhomedir_helper ggc_user # this will make user directory
$ sudo groupadd ggc_group
$ id ggc_user
uid=1001(ggc_user) gid=1001(ggc_user) groups=1001(ggc_user)
$ sudo usermod -aG docker ggc_user
$ id ggc_user
uid=1001(ggc_user) gid=1001(ggc_user) groups=1001(ggc_user),995(docker)
```
# Java周り
Confirm Java Versions
```shell=
$ java --version
openjdk 11.0.9.1 2020-11-04
OpenJDK Runtime Environment (build 11.0.9.1+1-post-Raspbian-1deb10u2)
OpenJDK Server VM (build 11.0.9.1+1-post-Raspbian-1deb10u2, mixed mode)
```
# Python周り
Confirm Python Versions
```shell=
$ python3 --version
Python 3.7.3
$ python --version
Python 2.7.16
$ pip3 --version
pip 18.1 from /usr/lib/python3/dist-packages/pip (python 3.7)
$ pip --version
pip 18.1 from /usr/lib/python2.7/dist-packages/pip (python 2.7)
```
Greengrassのコンポーネント(awsiotsdk)に必要なapt系libのパッケージのインストール
```shell=
$ sudo apt-get install cmake -y
$ sudo apt-get install libssl-dev -y
```
Python version up
```shell=
$ pip install --upgrade pip
$ pip -V
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
pip 20.3.4 from /home/pi/.local/lib/python2.7/site-packages/pip (python 2.7)
$ pip3 install --upgrade pip
$ pip3 -V
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
pip 21.0.1 from /home/pi/.local/lib/python3.7/site-packages/pip (python 3.7)
```
update setuptools also
```shell=
$ pip install --upgrade setuptools
$ pip show setuptools
Name: setuptools
Version: 56.0.0
Summary: Easily download, build, install, upgrade, and uninstall Python packages
Home-page: https://github.com/pypa/setuptools
Author: Python Packaging Authority
Author-email: distutils-sig@python.org
License: UNKNOWN
Location: /home/pi/.local/lib/python3.7/site-packages
Requires:
Required-by:
$ pip3 install --upgrade setuptools
$ pip3 show setuptools
pip3 show setuptools
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
Name: setuptools
Version: 56.0.0
Summary: Easily download, build, install, upgrade, and uninstall Python packages
Home-page: https://github.com/pypa/setuptools
Author: Python Packaging Authority
Author-email: distutils-sig@python.org
License: UNKNOWN
Location: /home/pi/.local/lib/python3.7/site-packages
Requires:
Required-by:
```
# Install OpenCV-Python
ref: https://stackoverflow.com/questions/53347759/importerror-libcblas-so-3-cannot-open-shared-object-file-no-such-file-or-dire
```shell=
sudo apt-get install libcblas-dev -y
sudo apt-get install libhdf5-dev -y
sudo apt-get install libhdf5-serial-dev -y
sudo apt-get install libatlas-base-dev -y
sudo apt-get install libjasper-dev -y
sudo apt-get install libqtgui4 -y
sudo apt-get install libqt4-test -y
pip3 install opencv-python
```
# スワップファイルの無効化
```shell=
pi@raspberrypi:~ $ free
total used free shared buff/cache available
Mem: 3919128 575484 2490584 251988 853060 2963372
Swap: 102396 0 102396
```
コマンドで無効化する
ref: https://qiita.com/homelan/items/62a09aa0d0586d0280a2
```shell=
$ sudo swapoff --all
$ sudo systemctl stop dphys-swapfile
$ sudo systemctl disable dphys-swapfile
$ systemctl status dphys-swapfile
```
SWAPファイルがなくなったことを確認
```shell
$ free
total used free shared buff/cache available
Mem: 3919128 584308 2414812 249176 920008 2955180
Swap: 0 0 0
```
※ スワップファイルの有効化
```shell
$ sudo systemctl start dphys-swapfile
$ sudo systemctl enable dphys-swapfile
$ systemctl status dphys-swapfile
```
# Ramdiskを作る
`/tmp/log/`にRamdiskを作る (https://www.rickmakes.com/setting-up-a-ram-disk-on-a-raspberry-pi-4/)
```shell=
$ sudo mkdir -p /tmp/log
$ sudo chown -R ggc_user:ggc_group /tmp/log
$ sudo mount -osize=2G -t tmpfs tmpfs /tmp/log
$ cd /tmp/log
```
ベンチマークを取る。書き込み317MB、読み込み500MBの速さ。
```shell
# bench mark
pi@raspberrypi:/tmp/log $ dd if=/dev/zero of=temp.txt bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 3.38299 s, 317 MB/s
pi@raspberrypi:/tmp/log $ dd if=temp.txt of=/dev/null bs=1M count=1024
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2.05276 s, 523 MB/s
```
起動時にマウントする
3行目当たりに次を追加する。
```shell
$ sudoedit /etc/fstab
tmpfs /tmp/log tmpfs defaults,noatime,mode=755,uid=ggc_user,gid=ggc_group,size=2g 0 0
```
一応確認
```
$ reboot
$ df -h
/dev/root 29G 7.5G 20G 28% /
devtmpfs 1.8G 0 1.8G 0% /dev
tmpfs 1.9G 0 1.9G 0% /dev/shm
tmpfs 1.9G 8.7M 1.9G 1% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup
tmpfs 2.0G 0 2.0G 0% /tmp/log
```
# 設定ファイルを作る
```
pi@raspberrypi:~ $ sudo mkdir /etc/lm-tokyo
pi@raspberrypi:~ $ sudo chown ggc_user:ggc_group -R /etc/lm-tokyo/
pi@raspberrypi:/home $ sudo su ggc_user
ggc_user@raspberrypi:~ $ touch /etc/lm-tokyo/settings.json
```
`settings.json`の中身
```json
{"camera_id": 1}
```
# ggc_userのHOMEにworkspaceを作る
```
pi@raspberrypi:/home $ sudo su ggc_user
ggc_user@raspberrypi:~ $ pwd
/home/ggc_user
ggc_user@raspberrypi:~ $ mkdir workspace
```
https://www.filemail.com/d/zjhjdgqofbxphva
# 権限について
Dockerが`root`で、Greengrassの実行ユーザーが`ggc_user`で、権限的に問題ないようにする。
次のようにする:
- ggc_userのユーザーディレクトリは`ggc_user:ggc_user`にする
- `/etc/lm-tokyo/`ディレクトリは`ggc_user:ggc_group`にする
- `/tmp/log/` ディレクトrは`ggc_user:ggc_group`にする
#
ref https://qiita.com/ryo-a/items/2edabbbe2b67654e29c9
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