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Showing posts from May, 2021

Disabling Zimbra's AntiSpam, Amavis and AntiVirus filtering

 Check whether antispam and antivirus service is enabled currently on server using the given command zmprov -l gs <mail.example.com> | egrep -i 'serviceen|servicein'  The above command will list all the services which are currently installed and enabled on the server. Disable the antivirus and antispam services using the given commands zmprov -l ms <mail.example.com> -zimbraServiceEnabled antispam  zmprov -l ms <mail.example.com> -zimbraServiceEnabled amavis zmprov -l ms <mail.example.com> -zimbraServiceEnabled antivirus  Comment the following line in the file /opt/zimbra/postfix/conf/main.cf content_filter = smtp-amavis:[127.0.0.1]:10024  Restart services on server zmcontrol restart  Confirm that the antispam and antivirus services are disabled with the given command zmprov -l gs <mail.example.com> | egrep -i 'serviceen|servicein'  zmcontrol status 

Linux Booting Procedure

 L inux Booting procedure The stages involved in Linux Booting Process are: 1. BIOS 2. Boot Loader     - MBR     - GRUB 3. Kernel 4. Init 5. Runlevel scripts 6. User Interface     STEP 1. BIOS This is the first thing which loads once you power on your machine. When you press the power button of the machine, CPU looks out into ROM for further instruction. The ROM contains JUMP function in the form of instruction which tells the CPU to bring up the BIOS BIOS determine all the list of bootable devices available in the system. Prompts to select bootable device which can be Hard Disk, CD/DVD-ROM, Floppy Drive, USB Flash Memory Stick Etc.. Operating System tries to boot from Hard Disk where the MBR contains primary boot loader.     STEP 2. Boot Loader  To be very brief this phase includes loading of the boot loader (MBR and GRUB/LILO) into memory to bring up the kernel. MBR (Master Boot R...