ERROR Logging Commands

There are 3 types of error log available in AIX:

1. Alog

2. Errlog

3. Syslog

Alog : used for console, boot, NIM and other applications log

Errlog : used for system, hardware, kernel and other applications log

Syslog : used for internet daemons and other applications log

Commands:

# alog –L

This command will list all log types that are available under alog.

# alog –t boot –o

# alog –t console –o

# alog –t NIM –o

# errpt –a

Error logging starts automatically with OS initialization and stops only when the system is shutdown.

Error log is maintained int he file /var/adm/ras/errlog file

Errdaemon is started by default in rc.boot

Command used to restart errdemon is:

# /usr/lib/errdemon

This will record error information from /dev/error file and store it in system’s default error log file/var/adm/ras/errorlog.

To stop, command used is:

# /usr/lib/errstop

To find the path to system error log, command used:

# /usr/lib/errdemon –l

This command will list details about error log.

To change the size of error log, command used is:

/usr/lib/errdemon –s “size in bytes”

For eg:

To change size to 2 MB,

/usr/lib/errdemon –s “2000000”

Errpt command generates report from error log file.

# errpt –a command is used to generate a report from error log file.

# errclear 0 command will clear the error log.

Clear errors up till 5 days ago, command used is:

# errclear 5

To list all errors on hdisk0, command used is:

# errpt –N hdisk0

To log operator messages, command used is:

# errlogger

For real time error logging, command used is:

# errpt –c > /dev/console

To install or redirect messages to system error log, command used is:

# errinstall

To update the error record template repository, command used is:

# errupdate

To log system messages, AIX server uses syslogd. These are stored in /etc/syslog.conf file, which is further used to log information about ftp access to a file.