Posts Tagged Suresh Dangi

LINUX BIOS-Suresh Dangi


When a microprocessor powers up, it starts executing instructions located in a ROM chip. These initial instructions are responsible for initializing the hardware (especially enabling RAM) and loading an operating system. The implementations and interfaces to this functionality vary from machine to machine, but its basic responsibility remains the same.

Here is an excellent Resource on-


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RHCE Exam requirement-Suresh Dangi

For RHCE exams given on Red Hat Enterprise Linux 3 and higher, the exam is organized as follows:

Troubleshooting and System Maintenance — 2.5 hours
Installation and Configuration — 3.0 hours
In order to earn RHCE, one must successfully complete all the RHCT-level Troubleshooting and System Maintenance requirements, and successfully complete enough additional RHCE items to earn a score of 80 or higher overall on the section.

In addition, one must score 70 or higher on the RHCT items of Installation and Configuration, and 70 or higher on the RHCE components of that section. We describe the skills associated with RHCT and RHCE below.

For RHCE exams given on Red Hat Linux 9, the following structure applies:

Troubleshooting — 2.5 hours
Multiple Choice — 1.0 hour
Installation and Configuration — 2.5 hours
In order to earn RHCE on these exams, one must successfully complete all the RHCT-level Troubleshooting requirements, score a minimum of 50 on the multiple choice, score 70 or higher on both the RHCE and RHCT components, and earn an overall score of 80 or better for the exam as a whole.

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How to stop/start network ethernet interface:Suresh Dangi

[root@ice ~]# ifdown eth0

[root@ice ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:2A:47:7F
inet addr: Bcast: Mask:
RX packets:1899 errors:0 dropped:0 overruns:0 frame:0
TX packets:833 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:923925 (902.2 KiB) TX bytes:283867 (277.2 KiB)
Interrupt:10 Base address:0x1400

[root@ice ~]# ifup eth0

Determining IP information for eth0… done.
[root@ice ~]# ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:0C:29:2A:47:7F
inet addr: Bcast: Mask:
inet6 addr: fe80::20c:29ff:fe2a:477f/64 Scope:Link
RX packets:1900 errors:0 dropped:0 overruns:0 frame:0
TX packets:838 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:924267 (902.6 KiB) TX bytes:284517 (277.8 KiB)
Interrupt:10 Base address:0x1400

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How to enable root telnet for redhat enterprise Linux RHEL4-Suresh Dangi

To enable direct telnet for root account on redhat linux enterprise servers ( i have done wthis on RHEL3 and RHEL4 without any issues ) over the network :
under /etc/ directory edit /etc/securetty file and add pts entries :

or Just remove /etc/securetty file alltogether , i prefer moving /etc/securetty it.
mv /etc/securetty /etc/securetty.sav
Bingo root telnet is enabled now … on redhat enterprise Linux 4 .That’s all you need to do to enable telnet access for root account on Linux servers. Root access is activated right away you don’t need to restart any services on redhat linux .
Warning : telnet is not secure and you should be using SSH only for logins on RHEL4.Keep reading redhatcert blog to find out how to enable SSH logins on redhat enterprise Linux 4.

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USe full Run Commands-Suresh Dangi

To Access… Run Command
Accessibility Controls -access.cpl
Accessibility Wizard -accwiz
Add Hardware Wizard -hdwwiz.cpl
Add/Remove Programs -appwiz.cpl
Administrative Tools -control admintools
Adobe Acrobat (if installed) -acrobat
Adobe Designer (if installed) -formdesigner
Adobe Distiller (if installed) -acrodist
Adobe ImageReady (if installed) -imageready
Adobe Photoshop (if installed) -photoshop
Automatic Updates -wuaucpl.cpl
Bluetooth Transfer Wizard -fsquirt
Calculator -calc
Certificate Manager -certmgr.msc
Character Map -charmap
Check Disk Utility -chkdsk
Clipboard Viewer -clipbrd
Command Prompt -cmd
Component Services -dcomcnfg
Computer Management -compmgmt.msc
Control Panel -control
Date and Time Properties -timedate.cpl
DDE Shares -ddeshare
Device Manager -devmgmt.msc
Direct X Control Panel (if installed)* -directx.cpl
Direct X Troubleshooter -dxdiag
Disk Cleanup Utility -cleanmgr
Disk Defragment -dfrg.msc
Disk Management -diskmgmt.msc
Disk Partition Manager -diskpart
Display Properties -control desktop
Display Properties -desk.cpl
Display Properties (w/Appearance Tab Preselected) -control color
Dr. Watson System Troubleshooting Utility -drwtsn32
Driver Verifier -Utility verifier
Event Viewer -eventvwr.msc
Files and Settings Transfer Tool -migwiz
File Signature Verification Tool -sigverif
Findfast -findfast.cpl
Firefox (if installed) -firefox
Folders Properties -folders
Fonts -control fonts
Fonts Folder -fonts
Free Cell Card Game -freecell
Game Controllers -joy.cpl
Group Policy Editor (XP Prof) -gpedit.msc
Hearts Card Game -mshearts
Help and Support -helpctr
HyperTerminal -hypertrm
Iexpress Wizard -iexpress
Indexing Service -ciadv.msc
Internet Connection Wizard -icwconn1
Internet Explorer -iexplore
Internet Properties -inetcpl.cpl
Internet Setup Wizard -inetwiz
IP Configuration (Display Connection Configuration) -ipconfig /all
IP Configuration (Display DNS Cache Contents) -ipconfig /displaydns
IP Configuration (Delete DNS Cache Contents) -ipconfig /flushdns
IP Configuration (Release All Connections) -ipconfig /release
IP Configuration (Renew All Connections) -ipconfig /renew
IP Configuration (Refreshes DHCP & Re-Registers DNS)-ipconfig /registerdns
IP Configuration (Display DHCP Class ID) -ipconfig /showclassid
IP Configuration (Modifies DHCP Class ID) -ipconfig /setclassid
Java Control Panel (if installed) -jpicpl32.cpl
Java Control Panel (if installed) -javaws
Keyboard Properties -control keyboard
Local Security Settings -secpol.msc
Local Users and Groups -lusrmgr.msc
Logs You Out Of Windows -logoff
Malicious Software Removal Tool -mrt
Microsoft Access (if installed) -msaccess
Microsoft Chat -winchat
Microsoft Excel (if installed) -excel
Microsoft Frontpage (if installed) -frontpg
Microsoft Movie Maker -moviemk
Microsoft Paint -mspaint
Microsoft Powerpoint (if installed) -powerpnt
Microsoft Word (if installed) -winword
Microsoft Syncronization Tool -mobsync
Minesweeper Game -winmine
Mouse Properties -control mouse
Mouse Properties -main.cpl
Nero (if installed) -nero
Netmeeting -conf
Network Connections -control netconnections
Network Connections -ncpa.cpl
Network Setup Wizard -netsetup.cpl
Notepad -notepad
Nview Desktop Manager (if installed) -nvtuicpl.cpl
Object Packager -packager
ODBC Data Source Administrator -odbccp32.cpl
On Screen Keyboard -osk
Opens AC3 Filter (if installed) -ac3filter.cpl
Outlook Express -msimn
Paint -pbrush
Password Properties -password.cpl
Performance Monitor -perfmon.msc
Performance Monitor -perfmon
Phone and Modem Options -telephon.cpl
Phone Dialer -dialer
Pinball Game -pinball
Power Configuration -powercfg.cpl
Printers and Faxes -control printers
Printers Folder -printers
Private Character Editor -eudcedit
Quicktime (If Installed) -QuickTime.cpl
Quicktime Player (if installed) -quicktimeplayer
Real Player (if installed) -realplay
Regional Settings -intl.cpl
Registry Editor -regedit
Registry Editor -regedit32
Remote Access Phonebook -rasphone
Remote Desktop -mstsc
Removable Storage -ntmsmgr.msc
Removable Storage Operator Requests -ntmsoprq.msc
Resultant Set of Policy (XP Prof) -rsop.msc
Scanners and Cameras -sticpl.cpl
Scheduled Tasks control -schedtasks
Security Center -wscui.cpl
Services -services.msc
Shared Folders -fsmgmt.msc
Shuts Down Windows -shutdown
Sounds and Audio -mmsys.cpl
Spider Solitare Card Game -spider
SQL Client Configuration -cliconfg
System Configuration Editor -sysedit
System Configuration Utility -msconfig
System File Checker Utility (Scan Immediately) -sfc /scannow
System File Checker Utility (Scan Once At The Next Boot)sfc /scanonce
System File Checker Utility (Scan On Every Boot) -sfc /scanboot
System File Checker Utility (Return Scan Setting To Default) sfc /revert
System File Checker Utility (Purge File Cache) -sfc /purgecache
System File Checker Utility (Sets Cache Size to size x)-sfc /cachesize=x
System Information -msinfo32
System Properties -sysdm.cpl
Task Manager -taskmgr
TCP Tester -tcptest
Telnet Client -telnet
Tweak UI (if installed) -tweakui
User Account Management -nusrmgr.cpl
Utility Manager -utilman
Windows Address Book -wab
Windows Address Book Import Utility -wabmig
Windows Backup Utility (if installed) -ntbackup
Windows Explorer -explorer
Windows Firewall -firewall.cpl
Windows Magnifier -magnify
Windows Management Infrastructure -wmimgmt.msc
Windows Media Player -wmplayer
Windows Messenger -msmsgs
Windows Picture Import Wizard (need camera connected) -wiaacmgr
Windows System Security Tool -syskey
Windows Update Launches -wupdmgr
Windows Version (to show which version of windows) -winver
Windows XP Tour Wizard -tourstart
Wordpad -write

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Windows XP/2000 Commands & Tools-Suresh Dangi

at (windows XP/2000)
Scheduling utility.
bootcfg (XP only)
This utility allows you to set up your boot options, such as your default OS and other loading options.
cacls (XP, 2000, & NT4.0)
Changes the ACLs (security Settings) of files and folders. Very similar to chmod in Linux.
comp (XP & 2000)
This utility is very similar to diff in Linux. Use the /? switch to get examples of command usage.
contig (works with NT4.0 and newer)
A great defrag utility for NTFS partitions.
control (XP only) – unpublished!
Allows you to launch control panel applets from the command line. control userpasswords2, for example will launch a helpful local user admin utility.
defrag (XP only – NT4.0 and Win2k use contig)
Yes, XP comes with a command line disk defrag utility. If you are running Win2k or NT4.0 there is still hope. Contig is a free defrag program that I describe on the defrag page.
diskpart (XP only)
Use this command to manage your disk partitions. This is the text version for the GUI Disk Manager.
driverquery (XP only)
Produces a list of drivers, their properties, and their versions. Great for computer documentation.
eudcedit (XP only) – unpublished!
Private Character editor. Yes with this program built into Windows XP you can create your own font!
Find String – similar to Linux’s Grep.
fsutil (XP only) – unpublished!
This is a utility with a lot of capability. Come back soon for great examples.
getmac (XP & 2000)
This command gets the Media Access Control (MAC) address of your network cards.
gpresult (XP & 2000)
This generates a summary of the user settings and computer group policy settings.
gpupdate (XP only)
Use this utility to manually apply computer and user policy from your windows 2000 (or newer) domain.
ipconfig (XP, 2000 & NT4.0)
This handy tool displays IP settings of the current computer and much more.
MMC (XP, 2000 & NT4.0) – Microsoft Management Console
This is the master tool for Windows, it is the main interface in which all other tools use starting primarily in Windows 2000 and newer systems.
Utility used to display text output one screen at a time. Ex. more c:\windows\win.ini
msconfig (XP only)
The ultimate tool to change the services and utilities that start when your Windows machine boots up. You can also copy the executable from XP and use it in Win2k.
msinfo32 (XP &smp; 2000)
An awesome diagnostic tool. With it you can get a list of running processes, including the residing path of the executable (great for manually removing malware) and get detailed information about hardware and system diagnostics.
narrator (XP only)
Turns on the system narrator (can also be found in accessibility options in control panel). Will will allow your computer to dictate text to you.
netsh (XP & 2000)
A network configuration tool console. At the ‘netsh>’ prompt, use the ‘?’ to list the available commands and type “exit” to get back to a command prompt.
netstat (XP)
A local network port tool – try netstat -ano.
nslookup (all)
A DNS name resolution tool.
openfiles (XP Only)
Allows an administrator to display or disconnect open files in XP professional. Type “openfiles /?” for a list of possible parameters.
Pathping (XP & 2000)
A cross between the ping and traceroute utilities. Who needs Neotrace when you can use this? Type “pathping ” and watch it go.
recover (XP & 2000)
This command can recover readable information from a damaged disk and is very easy to use.
reg (XP & 2000)
A console registry tool, great for scripting Registry edits.
sc (XP & 2000)
A command line utility called the Service Controller. A power tool to make service changes via a logon/logoff or startup/shutdown script.
schtasks (XP only)
A newer version of the AT command. This allows an administrator to schedule and manage scheduled tasks on a local and remote machines.
secedit (XP & 2000)
Use this utility to manually apply computer and user policy from your windows 2000 (or newer) domain. Example to update the machine policy: secedit /refreshpolicy machine_policy /enforce
To view help on this, just type secedit.
NOTE: In Windows XP SP1 and news, this command is superceded by: gpupdate /force
sfc (XP & 2000)
The system file checker scans important system files and replaces the ones you (or your applications) hacked beyond repair with the real, official Microsoft versions.
shutdown (XP & 2000)
With this tool, You can shut down or restart your own computer, or an administrator can shut down or restart a remote computer.
sigverif (XP only)
Microsoft has created driver signatures. A signed driver is Microsoft tested and approved. With the sigverif tool you can have all driver files analyzed to verify that they are digitally signed. Just type ‘sigverif’ at the command prompt.
systeminfo (XP only)
Basic system configuration information, such as the system type, the processor type, time zone, virtual memory settings, system uptime, and much more. This program is great for creating an inventory of computers on your network.
sysedit (XP/2000)
System Configuration File Editor. An old tool that was very handy for the Windows 9X days. msconfig is what you want to use now.
tasklist (XP pro only)
Tasklist is the command console equivalent to the task manager in windows. It is a must have when fighting scumware and viruses. Try the command:
tasklist /svc
to view the memory resources your services take up.
taskkill (XP only)
Taskkill contains the rest of the task manager functionality. It allows you to kill those unneeded or locked up applications.
tree (XP & 2000)
An amazing experience everyone should try! This command will provide a ‘family tree’ style display of the drive/folder you specify.
WMIC (XP & 2000)
Windows Management Instrumentation Command tool. This allows you to pull an amazing amount of low-level system information from a command line scripting interface.

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Top Ten Tips To Improve System Speed-Suresh Dangi

1. Let your PC boot up completely before opening any applications.
2. Refresh the desktop after closing any application. This will remove any unused files from the RAM.
3. Do not set very large file size images as your wallpaper. Do not keep a wallpaper at all if your PC is low on RAM (less than 64 MB).
4. Do not clutter your Desktop with a lot of shortcuts. Each shortcut on the desktop uses up to 500 bytes of RAM.
5. Empty the recycle bin regularly. The files are not really deleted from your hard drive until you empty the recycle bin.
6. Delete the temporary internet files regularly.
7. Defragment your hard drive once every two months. This will free up a lot of space on your hard drive and rearrange the files so that your applications run faster.
8. Always make two partitions in your hard drive. Install all large Softwares (like PSP, Photoshop, 3DS Max etc) in the second partition. Windows uses all the available empty space in C drive as virtual memory when your Computer RAM is full. Keep the C Drive as empty as possible.
9. When installing new Softwares disable the option of having a tray icon. The tray icons use up available RAM, and also slow down the booting of your PC. Also disable the option of starting the application automatically when the PC boots. You can disable these options later on also from the Tools or preferences menu in your application.
10. Protect your PC from dust. Dust causes the CPU cooling fan to jam and slow down thereby gradually heating your CPU and affecting the processing speed. Use compressed air to blow out any dust from the CPU. Never use vacuum.

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