02-13-2020
How are the disks attached ? a NAS, a SAN? what type?
But usually this sort of issues comes more from the OS side... Or SAN is flushing and syncing its cache but badly configured, not optimised to your usage (dont laugh I have seen cases with the best equipment...)
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we have an unix system which has
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Hello AlL,..
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Here we go....
Preface:
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LEARN ABOUT CENTOS
radwho
RADWHO(1) FreeRADIUS Daemon RADWHO(1)
NAME
radwho - show online users
SYNOPSIS
radwho [-c] [-d raddb_directory] [-F radutmp_file] [-i] [-n] [-N nas_ip_address] [-p] [-P nas_port] [-r] [-R] [-s] [-S] [-u user] [-U user]
[-Z]
DESCRIPTION
The FreeRADIUS server can be configured to maintain an active session database in a file called radutmp. This utility shows the content of
that session database.
OPTIONS
-c Shows caller ID (if available) instead of the full name.
-d raddb_directory
The directory that contains the RADIUS configuration files. Defaults to /etc/raddb.
-F radutmp_file
The file that contains the radutmp file. If this is specified, -d is not necessary.
-i Shows the session ID instead of the full name.
-n Normally radwho looks up the username in the systems password file, and shows the full username as well. The -n flags prevents this.
-N nas_ip_address
Show only those entries which match the given NAS IP address.
-p Adds an extra column for the port type - I for ISDN, A for Analog.
-P nas_port
Show only those entries which match the given NAS port.
-r Outputs all data in raw format - no headers, no formatting, fields are comma-separated.
-R Output all data in RADIUS attribute format. All fields are printed.
-s Show full name.
-S Hide shell users. Doesn't show the entries for users that do not have a SLIP or PPP session.
-u user
Show only those entries which match the given username (case insensitive).
-U user
Show only those entries which match the given username (case sensitive).
-Z When combined with -R, prints out the contents of an Accounting-Request packet which can be passed to radclient, in order to "zap"
that users session from radutmp.
For example,
$ radwho -ZRN 10.0.0.1 | radclient -f - radius.example.net acct testing123
will result in all an Accounting-Request packet being sent to the RADIUS server, which tells the server that the NAS rebooted. i.e. It
"zaps" all of the users on that NAS.
To "zap" one user, specifiy NAS, username, and NAS port:
$ radwho -ZRN 10.0.0.1 -u user -P 10 | radclient -f - radius.example.net acct testing123
Other combinations are also possible.
SEE ALSO
radiusd(8), radclient(1), radiusd.conf(5).
AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl.
17 Feb 2013 RADWHO(1)