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How to Resize tmpfs on Linux

Feri Setyawan - 0
tmpfs is a temporary file system that stores data in virtual. It does not create an file or directory on your hard...
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How to

Proxmox 6.0 Bug, hung kernel and how to fix it.

Feri Setyawan - 0
We have been running Proxmox 6.0 in some servers and after a few weeks, they were having a hung issue. one-by-one all...
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How to

Delete OLD data from Zabbix database

Feri Setyawan - 0
If you are using Zabbix for a long time, then you might notice that the database size of Zabbix is increasing every day. Then...
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Database

Unable to start MySQL on Ubuntu: AVC apparmor=”DENIED” operation=”open”

Feri Setyawan - 0
MySQL on Ubuntu fails to start. The following error messages are shown in the output of the journalctl -xecommand: AVC...
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Disk Utility

Converting between image formats

Feri Setyawan - 0
qemu-img convert: raw, qcow2, qed, vdi, vmdk, vhd The qemu-img convert command can do conversion between multiple formats, including qcow2, qed, raw, vdi, vhd, and vmdk.
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Database

Migrate MyISAM tables to INNODB using mysqldump

Feri Setyawan - 0
In this article you will find information how to convert MyISAM tables to INNODB.  The procedure here is an...
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Email

Test TCP Port 25 (smtp) access with telnet

Feri Setyawan - 0
In this article I show you how to use telnet to test the access to a mail server on TCP port 25.
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Disk Utility

Configure Disk Quota on Ubuntu Server

Feri Setyawan - 0
Scenario: Disk quotas can be used to limit the amount of disk space or the number of files allocated...
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Email

Zimbra Server Status shows all failed services

Feri Setyawan - 0
Step by step guide to solve problem zimbra some services are not running the following: To fix this issue:Check...
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How to

How to stop bad bots from visiting your website

Feri Setyawan - 0
Recently I noticed in Google Analytics a lot of referral to the page https://www.mydomain-name.com//h/1486338.html that doesn’t exist on one of my website....
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Disk Utility

Cannot access disk on zfs, Don’t Panic!!

Feri Setyawan - 0
I was having an issue with one of my Proxmox 5.0 version. When I was trying to start my VM it states...
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Email

Zimbra XXE / SSRF Vulnerability Disclosure

Feri Setyawan - 0
At March 18, 2019 , Rene Ottom, Vice President Product eMail and Collaboration announced that The Zimbra Security team has been...
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Most Read

Safe Reboot Of Linux Using Magic SysRq Key

How to Feri Setyawan - 0
If you are working on kernel development, or device drivers, or running a code that could cause a kernel panic, the SysRq...
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How to set a MySQL database to read-only mode

How to Feri Setyawan - 0
When we need to set the database as read-only on the fly (such as rebuild MySQL replication purpose) and we will use...
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How to check LDAPS certificate and TLS version

How to Feri Setyawan - 0
Get OpenSSL (a list of 3rd party sites here; I went with this one). The connection to your DC thus: openssl...
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How to run a manual backup on cPanel

How to Feri Setyawan - 0
You can use the /usr/local/cpanel/scripts/pkgacct script to create a cpmove archive for an account. After you create the archive, you can then restore the account on any cPanel...
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This a journal of linux sysadmin which based on the daily routine problems that I found. I document all these problems with the best possible language that I can to make it easier to understand. Hope this helps.

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