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Monitor and Perform System Management Functions

Table 5 summarizes the command-line interface (CLI) commands you can use to perform system management functions and monitor system management functions. In the table, the commands are grouped by functionality. In the remainder of this chapter, the commands are explained alphabetically.

Table 5: Commands for Monitoring and Performing System Management
Task
Task or Information to Monitor
Command
Software Version
Versions of software running on the router.
show version on page 95
JUNOS software extensions.
show system software on page 88
Router Up Time
Current time and how long the router has been operational.
show system uptime on page 91
Configuration
Current running system configuration.
show configuration on page 58
Verify the syntax of a configuration file.
test configuration on page 98
User Account Information
Users currently logged into the router.
show system users on page 92
Login permissions for the current user.
show cli authorization on page 57
Log Files and Recent History
Log files and their contents and recent user logins.
show log on page 60
Monitor the contents of log files.
monitor on page 46
Recent CLI history.
show cli history on page 58
Remote System Reachability
Check host reachability and network connectivity.
ping on page 47
Check the reachability of a remote ATM node.
ping atm on page 49
Determine the route to a network system.
traceroute on page 99
Network connection information.
show system connections on page 79
Connecting to Remote Systems
Open secure shell connections between the local router and a remote system.
ssh on page 96
Open a Telnet session to a remote system.
telnet on page 97
Network Time Protocol
NTP peers and their state.
show ntp associations on page 61
NTP peer variables.
show ntp status on page 62
Packet Forwarding Engine
Packet Forwarding Engine FPC.
show pfe fpc on page 63
Packet Forwarding Engine information.
show pfe terse on page 74
Packet Forwarding Engine next-hop.
show pfe next-hop on page 64
Packet Forwarding Engine route.
show pfe route on page 65
Packet Forwarding Engine SCB.
show pfe scb on page 66
Packet Forwarding Engine SFM.
show pfe sfm on page 68
Packet Forwarding Engine statistics.
show pfe statistics dma on page 70
show pfe statistics error on page 71
show pfe statistics ip on page 72
show pfe statistics notification on page 73
show pfe statistics pio on page 73
show pfe statistics traffic on page 74
System Software
System memory and buffer usage information.
show system buffers on page 78
Software processes running on the router.
show system processes on page 81
Systemwide protocol-related statistics.
show system statistics on page 88
Statistics about amount of free disk space in the router's file systems.
show system storage on page 90
Routing, routing protocol, and interface tasks that are currently running.
show task on page 93
State and checksum value for files in a file system.
show system audit on page 75
Host Name Lookup
Hostname lookup using DNS.
show host on page 59
ARP Table
Contents of the ARP table.
show arp on page 56
Zero the contents of the ARP table.
clear arp on page 43
Stop and Restart Processes and Software
Restart a JUNOS software process.
restart on page 55
Install or remove software bundles or packages from the router.
request system software on page 54
Stop the routing software.
request system halt on page 51
Reboot the routing software.
request system reboot on page 52
Pending system halts or reboots.
show system reboot on page 87
Clear a pending system halt or reboot.
clear system reboot on page 44
Back up the file systems on the router.
request system snapshot on page 53
Manipulate Files
Copy a file to another location on the router or to another system on the network.
file copy on page 44
List files and directories on the router.
file list on page 45
Display the contents of a file.
file show on page 46
Rename a file on the router.
file rename on page 45
Delete a file on the router.
file delete on page 45
Create a Shell
Create a UNIX-level shell.
start on page 97
Systemwide Messages
Send messages to users currently logged into the router.
request message on page 50
System Boot Messages
Display boot messages.
show system boot-messages on page 76
Information for Customer Support
Collect system information before contacting customer support.
request support information on page 50
Exit from CLI
Exit from the CLI to a UNIX shell.
quit on page 49

 


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