Building a low cost desktop computer
Motherboard Intel DZ75ML-45K Form Factor Micro-ATX Socket Type LGA1155 Chipset Intel Z75 Number of Memory Slots 4 Slots Memory Configuration 32 GB DDR3 Ethernet Controller Intel 82579V Audio Codec Intel High Defintion Audio Ports USB 2.0, USB 3.0, HDMI and DVI, No VGA port warranty 3 years CPU Intel Pentium G2020 Frequency 2900 MHz Bus […]
DSL and WiFi security tips for home internet users
Recently in India investigating agencies have found militants using WiFi access points of home users to send threat mails. and ultimately investigation is focused on owner of WiFi DSL connection. well this could happen with any one of us who is using DSL with WiFi. How is this tracked ? when a hacker connects to […]
Password less ssh, scp setup
Why is this required ? – if you hate password prompt 🙂 – For automation scripts copying data using scp, sftp Lets assume two machines local with user “manish” remote with user “autouser” Step 1 : Generate public/private key pair on “local” host manish@local$ssh-keygen -t dsa Generating public/private dsa key pair. Enter file in which […]
How does GPS works ?
-What is GPS? The Global Positioning System (GPS) is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the U.S. Department of Defense. -Is it free? Yes, GPS signals are free, you just need a GPS receiver device and maps. There is no subscription fee of GPS signals. […]
Playing with IPv6
IPv6 provides very large address space than IPv4. This results from the use of a 128 bit address compared to 32 bit address in IPv4. The new address space thus supports 2^128 addresses. This expansion provides flexibility in allocating addresses and routing traffic and eliminates the primary need for network address translation (NAT). To get […]
Remote execution of commands on Linux, Unix, Solaris using expect
#!/usr/local/bin/expect -f # ./ssh.sh user password IP/Host cmd cmd_arg set user [lrange $argv 0 0] set password [lrange $argv 1 1] set ipaddr [lrange $argv 2 2] set cmd [lrange $argv 3 3] set cmd_arg [lrange $argv 4 4] set timeout -1 spawn ssh $user@$ipaddr $cmd $cmd_arg match_max 100000 expect “*?assword:*” send — “$password\r” send […]
Buying a DTH new connection ? Read this
I am living in a high rise apartment at Gurgaon and recently I decided to go digital with dishtv HD. I got a good online deal and I paid by credit card. Installation guys turned up next day. They tried all three balconies of my apartment but could find signals. My apartment is on 3rd […]
Good bye ewebguru
Manish m@mka.in 06/09/2011 15:32 Hi, I was happy with the services and support. but every year I noticed prices went going up for renewal. while other hosting providers brought down prices or kept same. I fail to understand logic behind this business model. plus there was no handsome deal available for long term commitments. say […]
Unix remote user management using expect
To add a new user on remote unix host #!/usr/local/bin/expect -f # ./add.sh adminuser adminpass IP/Host user_to_be_added userpass_for_new_user # Manish Kumar Arya m@mka.in set user [lrange $argv 0 0] set password [lrange $argv 1 1] set ipaddr [lrange $argv 2 2] set username [lrange $argv 3 3] set userpass [lrange $argv 4 4] set timeout […]
Smart host relay email configuration on sendmail
1) Open /etc/mail/sendmail.mc Add following line in last define(`SMART_HOST’,`Some_SMTP_Server’) 2) Execute following to update /etc/mail/sendmail.cf file make -C /etc/mail/ Now in sendmail.cf you can see Smart host entry root@prg-vm:~# grep Some_SMTP_Server /etc/mail/sendmail.cf DSSome_SMTP_Server 3) restart or reload sendmail root@prg-vm:~# /etc/init.d/sendmail restart [ ok ] Restarting Mail Transport Agent (MTA): sendmail. root@prg-vm:~# 4) Verify logs May […]