树莓派 安装 centos 7
centos arm 镜像地址为：
http://mirror.centos.org/altarch/7/isos/armhfp/
1.centos 树莓派相关
http://www.21ic.com/eva/trick/201605/675705.htm
2.centos安装无线wifi模块
http://blog.csdn.net/fo11ower/article/details/53223475
安装wifi模块
curl --location https://github.com/RPi-Distro/firmware-nonfree/raw/54bab3d6a6d43239c71d26464e6e10e5067ffea7/brcm80211/brcm/brcmfmac43430-sdio.bin > /usr/lib/firmware/brcm/brcmfmac43430-sdio.bin
curl --location https://github.com/RPi-Distro/firmware-nonfree/raw/54bab3d6a6d43239c71d26464e6e10e5067ffea7/brcm80211/brcm/brcmfmac43430-sdio.txt > /usr/lib/firmware/brcm/brcmfmac43430-sdio.txt然后 reboot
查看无线网卡，连接wifi
nmcli d
nmcli d wifi #查看周围的wifi
nmcli d wifi connect yourSSID password 'yourpassword' #连接wifi
nmcli d show wlan0 #查看wlan0的状态
设置静态 ip
#设置网络配置信息
vi etc/sysconfig/network-script/ifcfg-???? #????是wifi的名字
BOOTPROTO=static #静态IP
IPADDR=192.168.31.160 #IP地址
GATEWAY=192.168.31.1 #默认网关
NETMASK=255.255.255.0 #子网掩码
修改DNS
vi /etc/resolv.conf #修改以下内容
nameserver 8.8.8.8 #google域名服务器
nameserver 8.8.4.4 #google域名服务器 223.5.5.5 阿里dns
nameserver 114.114.114.114 修改时间
yum install -y ntp
systemctl enable ntpd
systemctl start ntpd
修改时区
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime3.centos扩展磁盘空间
更新：
直接阅读 ~/readme ，执行 rootfs-expand 命令即可，无需执行下面的步骤
Filesystem Size Used Avail Use% Mounted on
rootfs 2.9G 2.8G 15M 100% /
/dev/root 2.9G 2.8G 15M 100% /
devtmpfs 214M 0 214M 0% /dev
tmpfs 44M 244K 44M 1% /run
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 88M 0 88M 0% /run/shm
/dev/mmcblk0p1 56M 19M 37M 34% /boot
tmpfs 88M 0 88M 0% /tmp
pi@raspberrypi ~ $ cat /sys/block/mmcblk0/mmcblk0p2/start # 查看第二分区的起始地址，后面会用到
122880
pi@raspberrypi ~ $ sudo fdisk /dev/mmcblk0 #使用fdisk操作磁盘
Command (m for help): d #d，删除分区
Partition number (1-4): 2 # 2，删除第二分区
Command (m for help): n #创建一个新分区
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p #创建主分区
Partition number (1-4, default 2): 2 #分区2
First sector (2048-7744511, default 2048): 122880 #输入第一次得到的第二分区起始扇区
Last sector, +sectors or +size{K,M,G} (122880-7744511, default 7744511): #最后一个sector，默认即可Enter
Using default value 7744511
Command (m for help): w #将上面的操作写入分区表
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
pi@raspberrypi ~ $ sudo reboot #设置完成需要重启，sudo reboot
pi@raspberrypi ~ $ sudo resize2fs /dev/mmcblk0p24.centos修改yum源
https://zhangzifan.com/centos-nginx-yum-source.html
仅供参考，arm的centos源地址为：http://mirror.centos.org/altarch/7.3.1611/os/armhfp/Packages/
5.附centos下各命令
http://www.cnblogs.com/summergarden/archive/2013/05/25/3098417.html
无法安装epel-release
运行以下代码后yum安装
cat > /etc/yum.repos.d/epel.repo << EOF
[epel]
name=Epel rebuild for armhfp
baseurl=https://armv7.dev.centos.org/repodir/epel-pass-1/
enabled=1
gpgcheck=0
EOF
搭建LAMP环境 若 安装 mariadb 出现
yum [Errno 256] No more mirrors to try
错误时
运行以下命令
- yum clean all
- yum makecache