Use Windows VScode to edit Linux files.

VScode is one of the best code editors with lots of add-on packages. Although you can install VScode in linux and use X windows to edit in linux, most people run VScode in Windows and would like to edit Linux files from Windows within VScode. There is a simple way to do this using the … Continue reading Use Windows VScode to edit Linux files.

Install Python pip on RHEL/Centos 7

When you initially try to install pip you may get an error as below: # python --version Python 2.7.5 [root]# yum install python-pip No package python-pip available. Error: Nothing to do We need to install epel-release first: [root] # yum install epel-release Installed: epel-release.noarch 0:7-11 Next install pip: [root]# yum install python-pip Installed: python2-pip.noarch 0:8.1.2-10.el7 … Continue reading Install Python pip on RHEL/Centos 7

Connect Excel to Cloudera Hive/Impala

Below procedure will help you connect Microsoft Excel to Cloudera Impala or Hive using ODBC driver. First download and install the MIT Kerberos Client for windows from Kerberos for Windows Release 4.1 - current release Make sure you get the Kerberos userid/password from the Cloudera Administrator and your are able to login and get a … Continue reading Connect Excel to Cloudera Hive/Impala

How to archive or delete old Office365 emails

There are two ways we can archive or delete old emails in Office365 outlook mailbox. You can use Outlook in Desktop and right click the inbox folder and select Properties->AutoArchive and select the options to archive or delete after preferred number of days.You can use Mozilla Thunderbird email client and right click on the email … Continue reading How to archive or delete old Office365 emails

Anaconda Python notes

Some notes on Anaconda python package manager: Reference: Conda is the main installer for the Anaconda packagesConda can be used to create multiple environments with different python or other package versions.The Anaconda packages are installed under /<some path>/Anaconda3/pkgs and other sub-directoriesInside a new Conda installation, the root environment is activated by default, so you … Continue reading Anaconda Python notes

TLS and SSL notes

Following are some concepts used in TLS/SSL configurations: Private Key: The key that is not shared with other connections but just used to decrypt the payload encrypted with public certificate.Public Certificate: The certificate that is provided to the remote connection as part of the SSL/TLS negotiations used to encrypt the message.CSR: certificate signing request is … Continue reading TLS and SSL notes

Manually Connecting an SSSD Client to an Active Directory Domain

Following is a good article which worked successfully to connect Centos7 to Active Directory for users in AD to be able to login to Centos. Manually Connecting an SSSD Client to an Active Directory Domain   Another useful testing procedures blog: QA:Testcase Active Directory Setup   Realmd and SSSD Active Directory Authentication reading Manually Connecting an SSSD Client to an Active Directory Domain

Wireshark commands

Some Wireshark filter fields match against multiple protocol fields. For example, "ip.addr" matches against both the IP source and destination addresses in the IP header. The same is true for "tcp.port", "udp.port", "eth.addr", and others. It's important to note that ip.addr == is equivalent to ip.src == or ip.dst == This can be counterintuitive in some cases. … Continue reading Wireshark commands

Kerberos commands

Common Kerberos commands: 1.Change password of a principal(user) $ kadmin.local kadmin.local: cpw <principalname> Enter password for princal "principalname@REALM.COM": 2.initialize a kerberos ticket $ kinit <principalname> To get detailed verbose info use below options: $ KRB5_TRACE=/dev/stdout kinit -V 3. Destroy the current ticket: $ kdestroy 4. Check the status of Kerberos KDC $ systemctl status kadmin $ systemctl … Continue reading Kerberos commands

Access webhdfs using Kerberos from laptop client

The following blog shows how to access a kerberized hadoop cluster from a Chrome browser in laptop. This will work mostly except change the below: 3. network.negotiate-auth.gsslib = C:\Program Files\MIT\Kerberos\bin\gssapi64.dll instead of the gssapi32.dll  since we mostly use 64-bit Firefox which doesnt work with the 32bit dll.