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OCI Architect and IAM Details

OCI Architecture: ------------------------------   Region :   it is a physical location of the oracle where the data centers are present, Localized geographic Areas consist of one or more availability zone.   Availability Domains(AD) :   AD are one or more fault-tolerant domains(data centers) inside a Region that connect with each other by low latency  and high bandwidth ADs are isolated from each other, fault-tolerant, unlikely to fail simultaneously, and physical infrastructure is not shared between the Ads.     Fault Domains (FD):   grouping of hardware and infrastructure within an AD to provide anti-affinity, these are the logical data centers. Each AD has three Fault Domains(FD),  logical Datacenter within an AD Resources placed in different FDs will not share a single point of hardware failure   In any region, resources in at most ONE fault domain are being actively changed at any point in time, this means that availability problem...
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Cloud Computing Characteristics

   5. Characteristics of Cloud Computing                     On-Demand Self Service No Human interaction Is needed for resource provisioning The resource can be provisioned with a click of a button Provisioning is available 24/7                        Broad Network Access Resources can be accessed from Anywhere using the network Ideally high broadband No physical access is required                               Resource Pooling Physical resources are shared between customers The Cloud's backbone decides which physical resource  to allocate for a customer's virtual services Some advanced cloud services allow for physical resource separati...
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Install/Update to Python 2.7 and latest Pip on AWS EC2 Linux:

  # install build tools  sudo yum install make automake gcc gcc-c++ kernel-devel git-core -y  # install python 2.7 and change default python symlink  sudo yum install python27-devel -y  sudo rm /usr/bin/python sudo ln -s /usr/bin/python2.7 /usr/bin/python  # yum still needs 2.6, so write it in and backup script  sudo cp /usr/bin/yum /usr/bin/_yum_before_27  sudo sed -i s/python/python2.6/g /usr/bin/yum  sudo sed -i s/python2.6/python2.6/g /usr/bin/yum  # should display now 2.7.5 or later:  python -V  # now install pip for 2.7  sudo curl -o /tmp/ez_setup.py https://sources.rhodecode.com/setuptools/raw/bootstrap/ez_setup.py   sudo /usr/bin/python27 /tmp/ez_setup.py  sudo /usr/bin/easy_install-2.7 pip  sudo pip install virtualenv # should display current versions: pip -V && virtualenv --version Install/Update to Python 2.7 on CentOS 6.5: $   python  -- version Python   2.6.6 $ $ ...
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Anonymous FTP in Linux.

  FTP server with different features:– 1. first it should be integrated with the AD server i.e exchange server. 2.anonymous user can access the server. 3.anonymous user can only able to upload the file and unable to view other files or folders except /incoming dir. 4.AD account user can able to see all the content of the file i.e /incomming and /outgoing. below is the /etc/vsftpd/vsftpd.conf settings =============================================== [root@Anonymoustest ~]# cat /etc/vsftpd/vsftpd.conf anonymous_enable=YES anon_upload_enable=YES local_enable=YES write_enable=YES local_umask=022 dirmessage_enable=YES xferlog_enable=YES connect_from_port_20=YES xferlog_std_format=YES chroot_local_user=NO chroot_list_enable=YES chroot_list_file=/etc/vsftpd/chroot_list listen=YES local_root=/outgoing pam_service_name=vsftpd userlist_enable=YES tcp_wrappers=YES user_config_dir=/etc/vsftpd/users chown_upload_mode=0664 anon_umask=002 before setting these things please make sure the server sho...
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