Juniper防火牆分為兩個版本：juniper srx系列和juniper netscreen系列（ssg是netscreen裡的中低端系列）。區別在於srx 使用juniper junos(老外開發的)平臺為基礎移植ScreenOS，而netscreen系列使用ScreenOS這是國人開發的。

Possible completions:
  compare              Compare configuration changes with prior version
  count                    Count occurrences  //個數
  display                

Show additional kinds of information   //顯示具體配置命令
  except                  Show only text that does not match a pattern  //不包含
  find                       Search for first occurrence of pattern
  hold                      Hold text without exiting the --More-- prompt
  last                       Display end of output only
  match                  Show only text that matches a pattern   //正則表示式匹配
  no-more              Don't paginate output
  request                Make system-level requests
  resolve                 Resolve IP addresses
  save                     Save output text to file
  trim                       Trim specified number of columns from start of line

範例1：[email protected]# show system | display set

set system host-name zhouli
set system domain-name juniper.net
set system backup-router 10.65.255.254
set system root-authentication encrypted-password "$1$phfm6Mpa$InsB0OMZj6CNBZdcdNix10"
set system name-server 8.8.8.8
set system services telnet
set system syslog user * any emergency
set system syslog file messages any notice
set system syslog file messages authorization info
set system syslog file interactive-commands interactive-commands any

範例2：show system login | match user | except "A|B" | count