命令升级固件

在ssh终端输入命令 sysupgrade /tmp/openwrt-squashfs-sysupgrade.bin(这个.bin文件是你之前上传到tmp文件夹的固件，这个命令中的固件名称也要改成你实际上传的固件名称来使用)

不清楚sysupgrade怎么用可以先全用命令sysupgrade --help 查看用法：

sysupgrade --help
Usage: /sbin/sysupgrade [<upgrade-option>...] <image file or URL>
    /sbin/sysupgrade [-q] [-i] <backup-command> <file>

upgrade-option:
     -d <delay>  add a delay before rebooting
     -f <config> restore configuration from .tar.gz (file or url)
     -i       interactive mode
     -c       attempt to preserve all changed files in /etc/
     -n       do not save configuration over reflash
     -T | --test
              Verify image and config .tar.gz but do not actually flash.
     -F | --force
              Flash image even if image checks fail, this is dangerous!
     -q       less verbose
     -v       more verbose
     -h | --help display this help

backup-command:
     -b | --create-backup <file>
              create .tar.gz of files specified in sysupgrade.conf
              then exit. Does not flash an image. If file is '-',
              i.e. stdout, verbosity is set to 0 (i.e. quiet).
     -r | --restore-backup <file>
              restore a .tar.gz created with sysupgrade -b
              then exit. Does not flash an image. If file is '-',
              the archive is read from stdin.
     -l | --list-backup
              list the files that would be backed up when calling
              sysupgrade -b. Does not create a backup file.

4、直接开始刷固件，等待刷机完成。升级完成后,系统会自动重启.......