truncate live file

How to truncate a live log file? 

Some situations force us to truncate live log file.

Simple way to truncate a live log file is -

as the owner of the file

> logfilename

this truncates the log

Free Memory on linux

You want to know nemory statistics on a linux box?
If this is the question, one can find various ways. Some if them are
1. free -m or free -g
The free command displays the total amount of free and used memory and swap memory in the system

2. cat /proc/meminfo
Gives you
MemTotal MemFree and so on in KB

3. vmstat -s
vmstat can display memory statistics including additional information about process, paging, cpu activity and so on

4. top command
top command lists the total memory used memory and free memory

HMGR0149E: An attempt to open a connection to core group DefaultCoreGroup has been rejected.

Problem

HMGR0149E: An attempt to open a connection to core group DefaultCoreGroup has been rejected.

Symptom

HMGR0149E: An attempt to open a connection to core group DefaultCoreGroup has been rejected. The sending process has a name of myplex1\nodea\nodeagent and an IP address of /123.456.115.115. Global security in the local process is Disabled. Global security in the sending process is Disabled. The received token starts with ab1c234:56abc7848e4:-8000. The exception is <null>

So, when I tried to sync node, I got the above error. Found this IBM Technote
http://www-01.ibm.com/support/docview.wss?uid=swg21596835

Per this technote, the solution is -

Resolving the problem

Resolve LTPA token mismatch or remove DCS_SECURE setting.

The DCS_SECURE setting can be removed by changing the Transport chain for the coregroup.

1. In the administrative console, click Servers > Core groups > Core group settings and select the respective core group

2. Under Transport type > Channel Framework
change the transport chain from DCS_SECURE to DCS

When checked in my config, it transport Type > Channel Framework > Transport chain was set to DCS.

I manually did a syncNode on the server process, got it fixed. Here is the procedure -

1. Stop Server

2. Stop Node

3. From the Node, issue syncNode like this
D:\IBM\WebSphere\AppServer\profiles\AppSrv01\bin>syncNode <dmgrnode> -conntype
 SOAP -username <adminuid> -password <adminpassword>

This command syncs the node with the DMGR.
ADMU0116I: Tool information is being logged in file
           D:\IBM\WebSphere\AppServer\profiles\AppSrv01\logs\syncNode.log
ADMU0128I: Starting tool with the AppSrv01 profile
ADMU0401I: Begin syncNode operation for node DMGRNode01 with Deployment
           Manager dmgr: 8879
ADMU0016I: Synchronizing configuration between node and cell.
ADMU0402I: The configuration for node DMGRNode01 has been synchronized
           with Deployment Manager dmgr: 8879

Once this command executes,

4. start the node agent

5. start server

--
Thanks and Regards
Bhaskar Ramaraju
http://www.linkedin.com/in/ramarajubhaskar

ls -R

Unusual Tasks With File Listings

When you create a new GPG key it wants you to wiggle the mouse or pound the keyboard or do something to create enough entropy to create a well-randomized key. There is an easy way, and that is to use the ls command to recursively list every file on your system:

$ ls -R /

Do this in a separate terminal, and then you don't have to do silly tiring things like wiggling mice. While we're on the subject of the ls command, you can list multiple directories in a single command by using simple wildcards:

$ sudo ls -l /var/*/*/

You can skip over subdirectories, as this example shows:

$ sudo ls -l /var/.../*/

I'm sure I copied this one from somewhere-- It draws a nice ASCII file tree of all subdirectories of the current directory:

$ find . -type d |sed 's:[^-][^/]*/:--:g; s:^-: |:'

Find Duplicate Files

The sure-fire way to find duplicate files is by comparing MD5 hashes. This compares only the first 20 characters of the md5sum, but it still takes a long time. It's the most accurate method, so I don't mind the wait:

$ find . -type f -exec md5sum '{}' ';' | sort | uniq --all-repeated=separate -w 20

You can also compare file sizes, which is a little less accurate but a lot faster:

$ find . -type f -printf "%p - %s" | sort -nr -k3 | uniq -D -f1

I use the first method when I start accumulating a lot of sloppy backups, and have too many copies of the same files littering my backup servers.
Find more here
https://www.linux.com/learn/docs/660651-bag-of-fun-and-useful-random-linux-comman
--
Thanks and Regards
Bhaskar Ramaraju
http://www.linkedin.com/in/ramarajubhaskar

AdminConsole throws 404

On one of the developer's RAD 7.5.5.1 box, WTE 7.0.0.21 admin console thows 404 when accessed.
http://localhost:admin_port/ibm/console is the standard URL.
*[11/6/12 12:53:57:159 CST] 00000012 webcontainer  E com.ibm.ws.webcontainer.WebContainer handleRequest SRVE0255E: A WebGroup/Virtual Host to handle /ibm/console/login.do has not been defined.*
This is the error message what it shows in the SystemOut.log.

AdminConsole is a systemApp that comes with the installation. There few commands using which one can remove the console and reinstall the app and even restore the app.
Solution :
1. Remove the AdminConsole application
2. Re install the AdminConsole application

1. Remove the AdminConsole -
Goto that profile\bin in which the problem is occurring,
start the server process in that profile.
Issue the following command from command line, with administrative privileges when running on windows
wsadmin -f deployConfig.py remove
This command removes the Adminconfig app.
Restart the server
2. Re install the AdminConsole application
Make sure the server is up and running,
Goto that profile where the issue is occurring,
issue the following command from command line, with administrative privileges when running on windows
wsadmin -f deployConfig.py install

This command installs the AdminConsole.
After successful exit from the command, bounce the server process.

Access the AdminConsole. It worked for me.

InfoCenter URL for the above quoted commands -

http://pic.dhe.ibm.com/infocenter/wasinfo/v6r1/index.jsp?topic=/com.ibm.websphere.base.doc/info/aes/ae/tcon_startstop.html

WASServiceCmd utility

I faced lot of issues with WebSphere services on Windows 2008 R2 64bit boxes.
WASService adds the WAS Services to Windows services list, but fails to stop/start them.

If I bounce the box, then services are getting started. If I stop them, it is setting the service status as blank. If I start it again, it throws "Windows could not start IBM WebSphere Application Server – servicename on local computer". When checked in the event logs "The IBM WebSphere Application Server V7.0 - CellManager01 service terminated with service-specific error %%134220456." is the message.

 

This is how I have added WAS Services to Windows Services

D:\IBM\WebSphere\AppServer\bin\WASService.exe -add CellManager01 -serverName dmgr -profilePath D:\IBM\WebSphere\AppServer\profiles\Dmgr01 -wasHome D:\IBM\WebSphere\AppServer -logFile D:\IBM\WebSphere\AppServer\profiles\Dmgr01\logs\dmgr\SystemOut.log -logRoot D:\IBM\WebSphere\AppServer\profiles\Dmgr01\logs\dmgr -restart true -startType automatic -stopArgs "-username xxxxxxxxx -password xxxxxxx" –encodeParams

To solve this, one can use WASServiceCmd Utility. This utility is easy to use, grabs all the info you need to pass, creates the service command, executes it.

Here is the technote about WASServiceCmd

http://www-01.ibm.com/support/docview.wss?rs=180&uid=swg21397335

Here is my WASServiceCmd log entry
wasservice.exe -add "CellManager01" -serverName "dmgr" -profilePath "D:\IBM\WebSphere\AppServer\profiles\Dmgr01" -encodeParams -stopArgs "-username xxxxxxxx -password ******** -startType automatic -restart true
wasservice.exe -add "Node01" -serverName "nodeagent" -profilePath "D:\IBM\WebSphere\AppServer\profiles\wlmprime01" -encodeParams -stopArgs "-username xxxxxxx -password ******** -startType automatic -restart true

These services are now, properly working.
 
--
Thanks and Regards
Bhaskar Ramaraju
http://www.linkedin.com/in/ramarajubhaskar

uptime

uptime is a measure of the time a machine has up been.
This is pretty useful command.

To know since when the system is up one can do like this at the terminal prompt
$uptime
11:10:27 up 9 mins, 2 users, Load average: 0.02, 0.24, 0.18

Determining system uptime in windows -

1.

C:\> systeminfo | find "Time:"
System Up Time:            0 Days, 8 Hours, 7 Minutes, 19 Seconds

Note: Windows Vista Business 64-bit and Windows 7 do not return a "System Up Time" but "System Boot Time" instead.

2.

C:\> net statistics server | find "since"
Server Statistics for \\COMPUTERNAME
 
Statistics since 8/31/2009 8:52:29 PM

remove directory

If you need to remove a directory, or files and or folders under a directory, in say, Solaris you do like this,
say to remove cache under wstemp
rm -r wstemp/*
which removes files folders under wstemp recursively.
rm test.txt
deletes test.txt file
rm -i wstemp/*
inquires and prompts yes or no for each file
In Linux
rm -f - force removes a file
rm -fr - force removes directory

In DOS -
rmdir is the command to remove a directory.
rmdir dSample
removes if dSample dir is empty.
To force remove
rmdir /S dSample
removes dSample directory but inquires
rmdir /S /Q dSample
removes dSample directory and its sub directories quietly.

Enjoy your day.

unix like commands in dos

are you looking for commands like tail, follow this url, http://www.microsoft.com/downloads/en/confirmation.aspx?familyId=9d467a69-57ff-4ae7-96ee-b18c4790cffd&displayLang=en download rktools.exe and enjoy the following commands -
* Acctinfo.dll (documented in Readme.htm)
* Adlb.exe: Active Directory Load Balancing Tool
* Admx.msi: ADM File Parser
* Atmarp.exe: Windows ATM ARP Server Information Tool
* Atmlane.exe: Windows ATM LAN Emulation Client Information
* Autoexnt.exe: AutoExNT Service
* Cdburn.exe: ISO CD-ROM Burner Tool
* Checkrepl.vbs: Check Replication
* Chklnks.exe: Link Check Wizard
* Chknic.exe: Network Interface Card Compliance Tool for Network Load Balancing
* Cleanspl.exe: Spooler Cleaner
* Clearmem.exe: Clear Memory
* Clusdiag.msi: Cluster Diagnostics and Verification Tool
* Clusfileport.dll: Cluster Print File Port
* Clusterrecovery.exe: Server Cluster Recovery Utility
* Cmdhere.inf: Command Here
* Cmgetcer.dll: Connection Manager Certificate Deployment Tool
* Compress.exe: Compress Files
* Confdisk.exe: Disk Configuration Tool
* Consume.exe: Memory Consumers Tool
* Creatfil.exe: Create File
* Csccmd.exe: Client-Side Caching Command-Line Options
* Custreasonedit.exe: Custom Reason Editor (documented in Readme.htm)
* Delprof.exe: User Profile Deletion Utility
* Dh.exe: Display Heap
* Diskraid.exe: RAID Configuration Tool
* Diskuse.exe: User Disk Usage Tool
* Dnsdiag.exe: SMTP DNS Diagnostic Tool (documented in Readme.htm)
* Dumpfsmos.cmd: Dump FSMO Roles
* Dvdburn.exe: ISO DVD Burner Tool
* Empty.exe: Free Working Set Tool
* Eventcombmt.exe: Check Replication
* Fcopy.exe: File Copy Utility for Message Queuing
* Frsflags.vbs
* Getcm.exe: Connection Manager Profile Update
* Gpmonitor.exe: Group Policy Monitor
* Gpotool.exe: Group Policy Objects
* Hlscan.exe: Hard Link Display Tool
* Ifilttst.exe: IFilter Test Suite
* Ifmember.exe: User Membership Tool
* Inetesc.adm: Internet Explorer Enhanced Security Configuration
* Iniman.exe: Initialization Files Manipulation Tool
* Instcm.exe: Install Connection Manager Profile
* Instsrv.exe: Service Installer
* Intfiltr.exe: Interrupt Affinity Tool
* Kerbtray.exe: Kerberos Tray
* Kernrate.exe: Kernel Profiling Tool
* Klist.exe: Kerberos List
* Krt.exe: Certification Authority Key Recovery
* Lbridge.cmd: L-Bridge
* Linkd.exe
* Linkspeed.exe: Link Speed
* List.exe: List Text File Tool
* Lockoutstatus.exe: Account Lockout Status (documented in Readme.htm)
* Logtime.exe
* Lsreport.exe: Terminal Services Licensing Reporter
* Lsview.exe: Terminal Services License Server Viewer
* Mcast.exe: Multicast Packet Tool
* Memmonitor.exe: Memory Monitor
* Memtriage.exe: Resource Leak Triage Tool
* Mibcc.exe: SNMP MIB Compiler
* Moveuser.exe: Move Users
* Mscep.dll: Certificate Services Add-on for Simple Certificate Enrollment Protocol
* Nlsinfo.exe: Locale Information Tool
* Now.exe: STDOUT Current Date and Time
* Ntimer.exe: Windows Program Timer
* Ntrights.exe
* Oh.exe: Open Handles
* Oleview.exe: OLE/COM Object Viewer
* Pathman.exe: Path Manager
* Permcopy.exe: Share Permissions Copy
* Perms.exe: User File Permissions Tool
* Pfmon.exe: Page Fault Monitor
* Pkiview.msc: PKI Health Tool
* Pmon.exe: Process Resource Monitor
* Printdriverinfo.exe: Drivers Source
* Prnadmin.dll: Printer Administration Objects
* Qgrep.exe
* Qtcp.exe: QoS Time Stamp
* Queryad.vbs: Query Active Directory
* Rassrvmon.exe: RAS Server Monitor
* Rcontrolad.exe: Active Directory Remote Control Add-On
* Regini.exe: Registry Change by Script
* Regview.exe (documented in Readme.htm)
* Remapkey.exe: Remap Windows Keyboard Layout
* Robocopy.exe: Robust File Copy Utility
* Rpccfg.exe: RPC Configuration Tool
* Rpcdump.exe
* Rpcping.exe
* RPing: RPC Connectivity Verification Tool
* Rqc.exe: Remote Access Quarantine Client
* Rqs.exe: Remote Access Quarantine Agent
* Setprinter.exe: Spooler Configuration Tool
* Showacls.exe
* Showperf.exe: Performance Data Block Dump Utility
* Showpriv.exe: Show Privilege
* Sleep.exe: Batch File Wait
* Sonar.exe: FRS Status Viewer
* Splinfo.exe: Print Spooler Information
* Srvany.exe: Applications as Services Utility
* Srvcheck.exe: Server Share Check
* Srvinfo.exe: Remote Server Information
* Srvmgr.exe: Server Manager
* Ssdformat.exe: System State Data Formatter
* Subinacl.exe
* Tail.exe
* Tcmon.exe: Traffic Control Monitor
* Timeit.exe (documented in Readme.htm)
* Timezone.exe: Daylight Saving Time Update Utility
* Tsctst.exe: Terminal Server Client License Dump Tool
* Tsscalling.exe: Terminal Services Scalability Planning Tools
* Uddicatschemeeditor.exe: UDDI Services Categorization Scheme Editor
* Uddiconfig.exe: UDDI Services Command-line Configuration Utility
* Uddidataexport.exe: UDDI Data Export Wizard
* Usrmgr.exe: User Manager for Domains
* Vadump.exe: Virtual Address Dump
* Vfi.exe: Visual File Information
* Volperf.exe: Shadow Copy Performance Counters
* Volrest.exe: Shadow Copies for Shared Folders Restore Tool
* Vrfydsk.exe: Verify Disk
* Winexit.scr: Windows Exit Screen Saver
* Winhttpcertcfg.exe: WinHTTP Certificate Configuration Tool
* Winhttptracecfg.exe: WinHTTP Tracing Facility Configuration Tool
* Winpolicies.exe: Policy Spy
* Wins.dll: WINS Replication Network Monitor Parser
* Wlbs_hb.dll & Wlbs_rc.dll: Windows Load Balancing Server Network Monitor Parsers