特权模式下：
Ruijie#delete flash:config.text    删除配置文件
Ruijie#dir   查看配置文件config.text已经删除
 -rw-     456696           Nov 15 2004 15:50:02   image.jar
 -rw-       1125           Nov 15 2004 15:49:56   index.htm
 -rw-    3875100           May 21 2012 11:16:14   s2126g.bin
 -rw-      32112           Nov 18 2004 18:22:32   shanghaiyizhuan
 -rw-        168           May 21 2012 10:24:50   vlan.dat                   
 -rw-        976           Jun 20 2005 19:11:06   vms15.htm
 -rw-    1341411           Nov 15 2004 15:49:59   webclt.jar
    total bytes: 32456704, bytes used: 5795566, bytes available: 26660970.
Ruijie#reload   重启交换机
System configuration has been modified. Save? [yes/no]:n  提示是否保存，输入N，不保存
Proceed with reload? [confirm]y 输入Y，重启交换机