linux log查看命令 for debug

1. 内核查看命令
dmesg
Usage: dmesg [-c] [-n LEVEL] [-s SIZE]
Print or control the kernel ring buffer
        -c              Clear ring buffer after printing
        -n LEVEL        Set console logging level
        -s SIZE         Buffer size


2. 应用层查看log命令
logread
Usage: logread [options]
Options:
    -s           Path to ubus socket
    -l           Got only the last 'count' messages
    -r   Stream message to a server
    -F            Log file
    -S           Log size
    -p            PID file
    -f                  Follow log messages
    -u                  Use UDP as the protocol