查看帮助信息（help）

命令功能

help命令用于查看帮助信息，也可以查看某条命令的具体使用方法。

命令格式

help

[command] --help

参数说明

使用指南

无

使用实例

• 示例1：固件版本为20.0.1.030及之后版本，获取当前路径下支持的命令。

  IES:/->help
  Commands:
  help     : Used to get context sensitive help.
  exit     : Used to terminate the cli session.
  timeout  : Used to set timeout limit to login shell.
  ping     : Used to test IPv4 network status.
  ifconfig : Used to check network device information.
  ps       : Used to check processes status.
  free     : Used to check memory status.
  top      : Used to check system resource used information. None parameter is allowed
  df       : Used to check disk used information.
  route    : Used to check route information. None parameter is allowed
  netstat  : Used to check network port status.
  date     : Used to get date info.
  meminfo  : Used to cat /proc/meminfo.
  cpustat  : Used to cat /proc/stat.
  fdisk    : Used to disk info.
  sftp     : Used to on/off sftp. with parameter enable or disable.
  develop  : Switch to development mode.
  npu-smi  : Used to npu-smi tool.

• 示例2：获取ping命令的具体使用方法。

  IES:/->ping --help
  BusyBox v1.18.4 (2014-08-09 16:28:25 CST) multi-call binary. 
   
  Usage: ping [OPTIONS] HOST 
   
  Send ICMP ECHO_REQUEST packets to network hosts 
   
  Options: 
      -4,-6       Force IP  name resolution 
      -c CNT      Send only CNT pings 
      -s SIZE     Send SIZE data bytes in packets (default:56) 
      -I IFACE/IP Use interface or IP address as source 
      -W SEC      Seconds to wait for the first response (default:10) 
              (after all -c CNT packets are sent) 
      -w SEC      Seconds until ping exits (default:infinite) 
              (can exit earlier with -c CNT) 
      -q      Quiet, only displays output at start 
              and when finished