Update Variables using BAsh_Profile in MAC/LInux

Sometimes you need to update the environment variables permanently. I have found setting JAVA_HOME and M2_HOME as an important and recurring requirement while working in Adobe, Symantec and even at Expedia Group. I am listing the steps here. Its simple :)

Steps:

1. Open Bash profile: vi ~/.bash_profile
2. Append: export M2_HOME=/Users/mfaiz/Projects/apache-maven-3.6.0/bin
3. export PATH=$PATH:$M2_HOME
4. export JAVA_HOME=/Users/mfaiz/my-jdk/Mac
5. On terminal run: source ~/.bash_profile
6. You can verify the install using: mvn - - version (This will show you version eg 3.6.0 in my case)

Delete Cache & Cookies for specific website in Non-IE Browsers like Chrome and Firefox

At times, we may feel the need to delete or clear the Cache & Cookies for a specific website only – and not the entire Browsing History – especially if you face errors like 400 Error or Server / inaccessible errors.  Sometimes, for a .Net type of application, you also get errors like the constructor to deserialize an object of type 'Autofac.Core.DependencyResolutionException' was not found.


In all such cases, you have already seen how to Clear Internet Cache & Cookies for a particular domain in Internet Explorer. Now let us see how to do it in Chrome and Firefox browsers.

Normally, we simply the entire Cookie cache of that browser. This will mean that, when you exercise this option, you will be clearing all the Cookies. But if you don’t to do this, you will have to clear the Cookie for that particular domain only.

Clear Cache & Cookies for specific website in Chrome

Open your Google Chrome browser and then open its Settings. Click on Show advanced settings and the scroll down till you see Privacy.

Now click on the Content settings button. You will see a new panel pop-up with settings for Cookies right on the top. In newer versions, scroll down some bit and you will see this screen.

Search here for the website whose cookies you want to neutralize. Click on the All cookies and site data button to open the following panel.


Delete Cache & Cookies for specific domain in Firefox

Open your Mozilla Firefox web browser and then open its Options. Select Privacy next. Here under History, you will see ‘You may want to clear your recent history or remove individual cookies‘. Click on the ‘remove individual cookies‘ link to open the following panel.


Search for the domain, select the Cookies you want to delete and then remove those Cookies.


You can also use CookieSpy a freeware that lets you manage Cookies of all Browsers in one place. Use it to delete Cookies from a particular domain.

How to solve "Failed to load shared object Sgment Prot after reloc:Permission Denied" Problem in Linux

All of a sudden, I started getting an error on my Linux box. I was mesmerized as to what could be the possible cause. The error message was pretty confusing. It said:

Failed to load shared object. cannot restore sgment prot after reloc permission denied

Initially I thought that this problem over my binaries are coming due to Permission errors. I checked the permissions on directories, binaries, executables. But all were fine. Then I though of running using 'su' or 'sudo' command, but to no avail.

I searched through Internet and found that someone has got a similar error in CentOS too. It so happens that CentOS 5 has the SE Linux feature set to enforcing. So, sometimes when you install CUBRID on CentOS and try to start the cubrid services cubrid service start, you may encounter the following error:
[cubrid@localhost ~]$ cubrid service start
cubrid: error while loading shared libraries: /opt/cubrid/lib/libcubridsa.so.8: cannot restore segment prot after reloc: Permission denied

This error is not limited to installation. It can come while running an application too. It should be remembered that This problem is seen in Linux gcc 4.1.2 i686 i386 GNU/Linux flavors too. Resolution is same. While installation of any package or Starting any service on a RHEL or CentOS based Server you may receive following Error
cannot restore segment prot after reloc: Permission denied

This Error comes when SELinux setting is enabled on the server. Someone even reported this coming from java librarie. The error was while trying to run several programs. For example:
Exception in thread "main" java.lang.UnsatisfiedLinkError: /usr/lib/libjpcap.so: /usr/lib/libjpcap.so: cannot restore segment prot after reloc: Permission denied

How to solve Failed to load shared object Sgment Prot after reloc:Permission Denied Problem in Linux

No problems!!
As already told you this comes due to Security-Enhanced Linux (SELinux). It is a Linux feature that provides a mechanism for supporting access control security policies through the use of Linux Security Modules (LSM) in the Linux kernel.
By Default SELinux is set to “enforcing” in CentOS on boot, this can be disabled permanently. To disable it edit file “/etc/selinux/config” and change SELINUX

To temporarily disable enforcement on a running system, type
/usr/sbin/setenforce 0

To permanently disable enforcement during a system startup
change "enforcing" to "disabled" in ''/etc/selinux/config''

It was a great relief to me when I got my control back on my binaries. Cheers!!

Access copy Share files between Host and guest file system in VMware virtual machine

There is definitely ways to achieve the task. It all depends on the choice of the host machine you are using and the guest OS in the VMware. Just keep in mind the following matrix:

Host	Guest	Tool
Win	Win	windows file sharing
Win	Linux	samba, ssh
linux	win	smbmount
linux	linux	nfs,ftp,telnet

The same above in graphics is

To summarize:
# If Both systems run Windows operating system, you can use Windows file sharing
# If You are connecting from a Linux system to a Windows system, you can use smbmount
# If You are connecting from a Windows system to a Linux system, use Samba
# If Both systems run Linux operating systems, use NFS, FTP and Telnet

For more detailed description you can also visit VMWare official website document on this topic at the following location. Click Here for VMWare Help

In order to share folders between the host operating system and the guest operating system you can use VMWare settings. Go to VM->Settings->options

The same is shown in the adjacent snapshot.
Added notes in July 2012 :-- VMware Workstation 4 Features | Documentation | Knowledge Base | Discussion Forums Prev Contents Last Next Using Shared Folders With shared folders, you can easily share files among virtual machines and the host computer. To use shared folders, you must have the current version of VMware Tools installed in the guest operating system and you must use the Virtual Machine Control Panel to specify which directories are to be shared. You can use shared folders with virtual machines running the following guest operating systems: Windows Server 2003 Windows XP Windows 2000 Windows NT 4.0 Linux with a kernel version of 2.4 or higher To set up one or more shared folders for a virtual machine, be sure the virtual machine is open in Workstation and click its tab to make it the active virtual machine. Go to Edit > Virtual Machine Settings > Options and click Shared folders. You can add one or more directories to the list. Those directories may be on the host computer or they may be network directories accessible from the host computer. In a Windows virtual machine, shared folders appear in My Network Places (Network Neighborhood in a Windows NT virtual machine) under VMware Shared Folders. For example, if you specify the name Test files for one of your shared folders, you can navigate to it by opening My Network Places > VMware Shared Folders > .host > Shared Folders > Test files. You can also go directly to the folder using the UNC path \\.host\Shared Folders\Test files. You can map a shared folder to a drive letter just as you would with a network share. Note: To see shared folders displayed in this way, you must update VMware Tools in the virtual machine to the current version. If your guest operating system has the version of VMware Tools that shipped with VMware Workstation 4.0, shared folders appear as folders on a designated drive letter. In a Linux virtual machine, shared folders appear under /mnt/hgfs. So the shared folder in this example would appear as /mnt/hgfs/Test files.

Vmware and sharing rocks!!

Intresting trick to Show your name after Time in Taskbar

To help young ones and also to the grown up prank players, I am again with a simple trick. This time it is something unusual. You can add your name (If you want even my name is good enuff!!) in place of AM and PM beside the time. This would be catchy in your group of friend/ colleagues. Just to add, my best friend *SO*loves to know about these small lil tricks. She is an avid computer/internet/social-networking user though (I think Mark Zuckerburg should hire both of us for using his virtual space FB.com to love, fight,discuss and romance!!)

You can start by going to Start -> Control Panel -> Regional and Language option -> Press Customize button -> Go to TIME tab -> Change AM symbol and PM symbol from AM and PM to your name -> Apply -> Ok.
Has it changed?
Have patience…Sometimes you need an additional setting too. Go to the Time in taskbar and Double Click it to open "Date and time property" .Look place where time changes in digital form i.e. 02:47:52 AM. Now you have to click the arrow to change the AM or PM. This will popup your name (that I believe is legitimately yours. Rolf!!!). Apply OK there.
Mission Accomplished!!!