display logbuffer

Function

The display logbuffer command displays logs in a log buffer.

Format

display logbuffer [ security ] [ slot slot-id | module module-name | starttime starttime-value [ endtime endtime-value ] | level { severity | severityEnum } | size value ] ^*

Parameters

Parameter	Description	Value
security	Indicates the log type as the security log.	-
slot slot-id	Specifies the slot number of logs to be displayed.	The value is a string of 1 to 23 case-sensitive characters, spaces not supported.
module module-name	Specifies a module name.	The value is a string of 1 to 31 case-sensitive characters, spaces not supported.
starttime starttime-value	Displays logs recorded from the specified start time.	The value is in the format of YYYY/MM/DD,HH:MM:SS. YYYY-MM-DD indicates the year/month/day. The value of YYYY ranges from 1970 to 9999; the value of MM ranges from 1 to 12; the value of DD ranges from 1 to 31. HH:MM:SS indicates the hour:minute:second. The value of HH ranges from 0 to 23; the value of MM and SS ranges from 0 to 59.
endtime endtime-value	Displays logs recorded by the specified end time.	The value is in the format of YYYY/MM/DD,HH:MM:SS. YYYY-MM-DD indicates the year/month/day. The value of YYYY ranges from 1970 to 9999; the value of MM ranges from 1 to 12; the value of DD ranges from 1 to 31. HH:MM:SS indicates the hour:minute:second. The value of HH ranges from 0 to 23; the value of MM and SS ranges from 0 to 59.
level severity	Displays logs based on severities.	The value is an integer ranging from 0 to 7. 0: emergencies: an error of urgency level 1: alert: an error that needs to be corrected immediately 2: critical: a major error 3: error: a minor error 4: warning: a potential error 5: notification: information that should be noticed 6: informational: an informational message 7: debugging: a debugging message
severityEnum	Displays logs based severity.	0: emergencies: an error of urgency level 1: alert: an error that needs to be corrected immediately 2: critical: a major error 3: error: a minor error 4: warning: a potential error 5: notification: information that should be noticed 6: informational: an informational message 7: debugging: a debugging message
size value	Specifies the number of logs to be displayed.	The value is an integer ranging from 1 to 10240.

Views

All views

Default Level

3: Management level

Task Name and Operations

Task Name	Operations
log	read

Usage Guidelines

Usage Scenario

To display logs in a log buffer, run the display logbuffer command.

The number of logs to be displayed using the display logbuffer command is determined by the number specified using the info-center logbuffer command. If the number of logs in the log buffer is less than that specified using value, all existing logs are displayed.

The display logbuffer command can display service logs, event logs and logs of other types. For information about event logs and logs of other types, see Log Reference. If a log is mapped to an "event trap OID", the log is an event log paired with an event trap. Event logs and the paired event traps have the same contents, and event logs can be queried based on the event trap OIDs.

The display logbuffer security command displays logs with the security log attribute.

Precautions

The log buffer records log messages of levels 0 through 4 by default. You can run the

info-center log-severity command to set the log severity as needed:

Set the severity of log messages to a value ranging 5 through 7 so that the log buffer does not record these log messages.
Set the severity of log messages to a value ranging 0 through 4 so that the log buffer records these log messages.

If there are a large number of logs on the device, running the display logbuffer command to display logs based on the start time, end time, log severity, and number of logs to be displayed is recommended. Otherwise, the following problems may occur due to excessive logs:

The displayed information is repeatedly refreshed, causing desired information unable to be located.
The system does not respond because of long-time information traversing and searching.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display the level 4 log information.

<HUAWEI> display logbuffer level 4
Allowed max buffer size : 10240
Actual buffer size : 512
Channel number : 4 , Channel name : logbuffer
Dropped messages : 0
Overwritten messages : 0
Current messages : 6

Dec 19 2020 18:11:33 HUAWEI %%01INFO/4/SUPPRESS_LOGINFO(s):CID=0x80600407;Log SSHS/CALLHOME_RECORD is suppressed 1 in last 1 seconds.

**Table 1** Description of the **display logbuffer** command output
Item	Description
Allowed max buffer size	Maximum size of the log buffer.
Actual buffer size	Used size of the log buffer.
Channel number	Channel number.
Channel name	Channel name.
Dropped messages	Number of dropped messages.
Overwritten messages	Number of overwritten messages.
Current messages	Number of existing messages.