ARM板挂载PC端的文件夹

• NFS网络挂载文件夹，用于文件传输

#192.168.1.11为PC端的IP地址
mount -t nfs -o nolock,nfsvers=3 192.168.1.11:/home/yl/nfs nfs/

• 静态IP永久设置

#在/etc/rc.local文件中添加
ifconfig eth0 192.168.1.106 netmask 255.255.255.0

• UI程序启动脚本

#在/home/root/目录下，新建nfs网络挂载文件夹
mkdir nfs
#在/etc/profile.d/文件夹里，在qt5.sh脚本里加入
export QT_QPA_EGLFS_KMS_CONFIG=/home/root/eglfs.json
export QT_QPA_PLATFORM=eglfs
ifconfig usb0 down
cd /home/root
mount -t nfs -o nolock,nfsvers=3 192.168.1.11:/home/yl/nfs nfs/
chmod +x nfs/TopbandUI
cd ./nfs
./TopbandUI --no-sandbox &

• 调试qt程序，判断是否缺失库文件

export QT_DEBUG_PLUGINS=1

• linux beyond compare4过期解决办法

#	1、破解
cd /usr/lib/beyondcompare/
sudo sed -i "s/keexjEP3t4Mue23hrnuPtY4TdcsqNiJL-5174TsUdLmJSIXKfG2NGPwBL6vnRPddT7tH29qpkneX63DO9ECSPE9rzY1zhThHERg8lHM9IBFT+rVuiY823aQJuqzxCKIE1bcDqM4wgW01FH6oCBP1G4ub01xmb4BGSUG6ZrjxWHJyNLyIlGvOhoY2HAYzEtzYGwxFZn2JZ66o4RONkXjX0DF9EzsdUef3UAS+JQ+fCYReLawdjEe6tXCv88GKaaPKWxCeaUL9PejICQgRQOLGOZtZQkLgAelrOtehxz5ANOOqCaJgy2mJLQVLM5SJ9Dli909c5ybvEhVmIC0dc9dWH+/N9KmiLVlKMU7RJqnE+WXEEPI1SgglmfmLc1yVH7dqBb9ehOoKG9UE+HAE1YvH1XX2XVGeEqYUY-Tsk7YBTz0WpSpoYyPgx6Iki5KLtQ5G-aKP9eysnkuOAkrvHU8bLbGtZteGwJarev03PhfCioJL4OSqsmQGEvDbHFEbNl1qJtdwEriR+VNZts9vNNLk7UGfeNwIiqpxjk4Mn09nmSd8FhM4ifvcaIbNCRoMPGl6KU12iseSe+w+1kFsLhX+OhQM8WXcWV10cGqBzQE9OqOLUcg9n0krrR3KrohstS9smTwEx9olyLYppvC0p5i7dAx2deWvM1ZxKNs0BvcXGukR+/g" BCompare
#	2、输入密钥：
--- BEGIN LICENSE KEY ---
GXN1eh9FbDiX1ACdd7XKMV7hL7x0ClBJLUJ-zFfKofjaj2yxE53xauIfkqZ8FoLpcZ0Ux6McTyNmODDSvSIHLYhg1QkTxjCeSCk6ARz0ABJcnUmd3dZYJNWFyJun14rmGByRnVPL49QH+Rs0kjRGKCB-cb8IT4Gf0Ue9WMQ1A6t31MO9jmjoYUeoUmbeAQSofvuK8GN1rLRv7WXfUJ0uyvYlGLqzq1ZoJAJDyo0Kdr4ThF-IXcv2cxVyWVW1SaMq8GFosDEGThnY7C-SgNXW30jqAOgiRjKKRX9RuNeDMFqgP2cuf0NMvyMrMScnM1ZyiAaJJtzbxqN5hZOMClUTE+++
--- END LICENSE KEY -----
#	3、删除用户目录下.config/bcompare/下的所有文件，然后再输入密钥

• 查看WIFI的状态信息

# 查看当前wifi连接信息
nmcli device show wlan0
# 开启wifi
nmcli device connect wlan0
ifconfig wlan0 up
# 关闭wifi
nmcli device disconnect wlan0
ifconfig wlan0 down
# wifi扫描
iwlist wlan0 scan
nmcli device wifi list
# 获取当前wifi连接状态
iwconfig wlan0
iw dev wlan0 link
# 主动连接wifi名为“iPhone4 ”，密码为“yl123456”
nmcli device wifi connect iPhone4 password yl123456
# 关闭当前连接wifi
nmcli connection down wifiname
# 连接之前已经连接过的wifi
nmcli connection up wifiname

• U盘插入拔出检测

df --block-size=1M | awk 'NR>1{printf "%s\t%.2f\t%s\n", $1, $2, $6}'

• 避免每次用户登录，以后不用输入密码

passwd -d root

• DHCP和静态IP配置

# ipv4 dhcp配置
nmcli con modify "Wired connection 1" ipv4.method auto
# ipv4 静态ip配置
nmcli con modify "Wired connection 1" ipv4.method manual ipv4.addresses 192.168.1.106/24 ipv4.gateway 192.168.1.1 ipv4.dns 192.168.10.200
# ip配置后，需要重新连接
nmcli con up "Wired connection 1"
# 查看网络设备状态
ip addr show

• 修改systemd工具管理的服务顺序

# UI程序服务文件/lib/systemd/system/hmi.service，在[Unit]增加dnsmasq.service
After=systemd-logind.service dnsmasq.service

• 通过hmi服务脚本执行UI程序，解决不能输出UI日志问题

# 在[Service]里添加
StandardOutput=kmsg+console