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SysAdminStuff ⋆ Page 14 of 15 ⋆ My Online Notebook

How to install MySQL through YaST

This is a repost of a post from an old blog, made on January 9, 2012, that used to be on:

http://adminramble.com/install-mysql-yast/

Original post:

I was looking into Novell Service Desk as solution for our Help-desk department today, so i decided to test it by installing it on a single machine together with a MySQL server to act as its database. It’s been a few years since the last time I installed MySQL, last few years I’m mostly working with Informix and MS SQL.

I just wanted it installed as soon as possible so I decided to install the it through YaST thinking it would be faster, but neglected the fact that YaST scatters the installation through several directories so I spend some time locating the files. So this are the short instructions for those who decided to do it with YaST. I was installing on SUSE Linux Enterprise Server 11 SP1

HOW TO INSTALL MYSQL THROUGH YAST ON SLES 11
  1. Open YaST(just type yast in terminal)>Software>Software management(use Tab button to move between sections), or go straight to Install Software on main menu if you’re working through GUI
  2. In the search filed type mysql and press Enter or Search
  3. Select mysql package, mysql-client will be selected also automatically also, and press Accept to install them.
    (mysql user and mysql group will be created automatically, so you don’t need to do that)If you want to find out where did YaST installed all the files, you can do that either through the terminal with rpm -qal mysql command, or if you’re working through the GUI by opening YaST, typing mysql i search box and selecting mysql package. On the File List tab you can see where all the files are installed.

  4. Edit the /etc/my.cnf file, by adding user=mysql after the [mysqld]
    your file should look something like this:

    [mysqld]
 user = mysql
  5. Crate a mysql database with the following command:
    /usr/bin/mysql_install_db –user=mysql
  6. Start your server with:
    /usr/bin/mysqld_safe –user=mysql &
  7. Check if the server is running with:
    /usr/bin/mysqladmin version
    You should get information about the software version.
  8. Connect to your MySQL server with:
    /usr/bin/mysql -u root
    You should get the mysql> prompt if everything is okay.

 

There are other ways to install MySQL besides YaST, if you would like to install MySQL from source you can check this blog

cPanel a lot of accounts quota or bandwidth exceeded.

WHM/cPanel all packages get reapplied, and Upgrade/Downgrade notification is sent for all accounts.

lvemanager-1.0-9.9 has been released in production by CloudLinux yesterday, and it has caused issues on WHM/cPanel servers, by reapplying packages to all accounts.

https://cloudlinux.com/blog/clnews/lve-manager-1099-and-lveutils-1523-released-to-production.php

All accounts that had their quotas and limits modified, without modifying the related packages, have been reassigned to values that are specified in the package, they are assigned to. This will cause  quota or bandwidth being exceeded on a lot of accounts on the server, if you haven’t been modifying them properly.

If you have received a following type of mail for all accounts on your server,  that account Upgrade/Downgrade was made, then it is due to lvemanager update to lvemanager-1.0-9.9.

Upgrade/Downgrade: %account" from <root@%hostname> for email@domain.tld

If you check your yum update logs, you will see lvemanager-1.0-9.9 has been installed on the server overnight, which is the cause of the issues with the packages being reapplied.

# grep lve /var/log/yum.log | tail -2
Dec 17 05:09:12 Updated: lve-utils-1.5-2.3.el6.cloudlinux.i686
Dec 17 05:09:27 Updated: lvemanager-1.0-9.9.el6.cloudlinux.noarch
#

According to the comments on CloudLinux blog

“You can find their last allocated settings from your last backup –
less /cpb/incremental/accounts/domainname/cp/domainname”

https://cloudlinux.com/blog/clnews/lve-manager-1099-and-lveutils-1523-released-to-production.php#comments

Update by CloudLinux:

CloudLinux has in the meantime issued a statement regarding LVE Manager 1.0-9.9 issues, with some details on how to revert the values to one prior the upgrade.

http://cloudlinux.com/blog/clnews/lve-manager-1099-issues.php

Excerpt from their blog:

If you have cPanel backups enabled, you can get previous limits from backups. Here is an example how to do it:

cd /backup/cpbackup/daily
tar -zxvf username.tar.gz username/cp
tar -zxvf username.tar.gz username/quota

cat username/quota
cat username/cp/username | egrep "MAX|BWLIMIT"

Then set limits manually with WHM –> Modify account.

UPDATED: Dec 18, 07:16 AM UTC

Here are some commands that should help you returning quotas back, if you have cpanel backups enabled.

Get list of users over quota:

cd /backup/cpbackup/daily/
repquota -a | grep "+" | awk '{ print $1 }' > users_overquota

Extract only quota files for them:

for i in `cat users_overquota` ; do echo "tar -zxvf "$i".tar.gz "$i"/quota" ; done | sh

Echo username and quota limit, the output value means Mb:

for i in `cat users_overquota` ; do echo "echo -e '\n'; echo "$i"; cat "$i"/quota " ; done | sh

Now use cpanel’s script to set quotas, based on above output add ‘M’ key for it. Copy-paste username and %value% and run command for each:

/scripts/editquota username %value%M

Another update:

CloudLinux has made another updated about the issue, and have provided a script that could be used to restore those limits if cPanel backups were enabled.

http://cloudlinux.com/blog/clnews/autorestore-package-limits-script-after-lvemanager1099-update.php

Excerpt from their blog:

Due to number of servers affected with custom package limits reset to package defaults we prepared a script that could be used to restore those limits if cPanel backups were enabled. It restores all limits if:

  • package was not changed since backup time;
  • limits are the same as package limits;
  • all package limits in backup are the same as current package limits.

Required files: %backup_location%/files/_etc_quota.conf.gz and %backup_location%/dirs/_var_cpanel.tar.gz . Please, restore them from a day/week before LVE Manager update (before December 16). Better to place them in the same /root/ directory.

Download the following script and make it executable:

wget http://kb.cloudlinux.com/scripts/autorestore.py
chmod 755 autorestore.py

Run it the following way:

./autorestore.py /root/_var_cpanel.tar.gz /root/_etc_quota.conf.gz
The script will back up current user limits to /var/cpanel/users.%timestamp% before changing limits.

How to remove author name on all your WordPress posts

Author name and links can be hidden in all WordPress posts on your site, by editing the default CSS Stylesheet, and adding the following to it:

.author {
     display: none;
}

Go to Appearance > Edit CSS, and you will be taken to CSS Stylesheet Editor.

Default CSS Stylesheet for Twenty Sixteen theme should look like this.

/*
Welcome to Custom CSS!

To learn how this works, see http://wp.me/PEmnE-Bt
*/

It should look something like this, after you add the snippet to hide name and link of the site account used to make the post.

/*
/*
Welcome to Custom CSS!

To learn how this works, see http://wp.me/PEmnE-Bt
*/
/* Remove posting account links from all posts*/
.author {
	display: none;
}

Source:

https://en.forums.wordpress.com/topic/can-i-remove-author-in-all-my-posts

How to reset NTFS permissions on drives or folders

This is a repost of a post from an old blog, made on November 22, 2012, that used to be on:

http://beginner.adminramble.com/reset-ntfs-permissions-drives-folders/

Original post:

Friend of mine had problems with the permissions on the external hard drive, he was constantly getting the Consent UI asking him for Administrator access because of the file permissions on the drive.

Here is how you can reset the NTFS permissions on hard drive or a folder to a default Windows permissions.

  • Click the Start button and in the Search bar type cmd
  • Right click the cmd.exe you get as the result and click on Run as administrator
  • In command prompt go to a drive or a folder you want to reset NTFS permissions using something like: 
    cd /d e:\foldername
  • Reset NTFS with: 
    icacls * /T /Q /C 
/RESET
  • You should be able to work with files now without the Consent UI popping out all the time.

Install ClamAV on RHEL/CentOS 7, and configure clamd

ClamAV on RedHat Enterprise Linux (RHEL) and CentOS 7 can be installed from Extra Packages for Enterprise Linux (EPEL) repository.

One liner to install EPEL repo, ClamAV packages, and correct configuration files.

yum -y install epel-release; yum -y install clamav-server clamav-data clamav-update clamav-filesystem clamav clamav-scanner-systemd clamav-devel clamav-lib clamav-server-systemd; sed -i '/^Example$/d' /etc/freshclam.conf; sed -i '/^Example$/d' /etc/clamd.d/scan.conf; sed -i -e 's/#LocalSocket \/var\/run\/clamd.scan\/clamd.sock/LocalSocket \/var\/run\/clamd.scan\/clamd.sock/g' /etc/clamd.d/scan.conf; sed -i '/REMOVE ME/d' /etc/sysconfig/freshclam; systemctl enable clamd@scan; freshclam; systemctl start clamd@scan; systemctl status clamd@scan;

If everything is OK, output should end something like this.

Downloading daily.cvd [100%]
daily.cvd updated (version: 20882, sigs: 1566229, f-level: 63, builder: neo)
Downloading bytecode.cvd [100%]
bytecode.cvd updated (version: 268, sigs: 47, f-level: 63, builder: anvilleg)
Database updated (3990501 signatures) from database.clamav.net (IP: 104.131.196.175)
clamd@scan.service - Generic clamav scanner daemon
   Loaded: loaded (/usr/lib/systemd/system/clamd@scan.service; enabled)
   Active: active (running) since Sun 2015-09-06 09:24:37 EDT; 16ms ago
 Main PID: 707 (clamd)
   CGroup: /system.slice/system-clamd.slice/clamd@scan.service
           └─707 /usr/sbin/clamd -c /etc/clamd.d/scan.conf --nofork=yes

Sep 06 09:24:37 test.demo.local systemd[1]: Started Generic clamav scanner daemon.
Sep 06 09:24:37 test.demo.local clamd[707]: clamd daemon 0.98.7 (OS: linux-gnu, ARCH: x86_64, CPU: x86_64)
Sep 06 09:24:37 test.demo.local clamd[707]: Running as user clamscan (UID 998, GID 997)
Sep 06 09:24:37 test.demo.local clamd[707]: Log file size limited to 1048576 bytes.
Sep 06 09:24:37 test.demo.local clamd[707]: Reading databases from /var/lib/clamav
Sep 06 09:24:37 test.demo.local clamd[707]: Not loading PUA signatures.
Sep 06 09:24:37 test.demo.local clamd[707]: Bytecode: Security mode set to "TrustSigned".
[root@test ~]#

ClamAV Installation details:

Install EPEL repo:

EPEL can be installed from CentOS Extras repository, which is enabled by default, with the following command.

yum -y install epel-release

In case epel-release package is not available for any reason, it can be installed from Webtatic or Fedora servers, with following commands.

rpm -Uvh https://mirror.webtatic.com/yum/el7/epel-release.rpm

or

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Install ClamAV packages:

Once EPEL is installed ClamAV packages can be installed with the following command.

yum -y install clamav-server clamav-data clamav-update clamav-filesystem clamav clamav-scanner-systemd clamav-devel clamav-lib clamav-server-systemd

Once all necessary packages have been installed, freshclam.conf file needs to be edited, for ClamAV update to work.

Correct freshclam.conf file:

Default installation will return the following error when “freshclam” command is run, due to file being marked as example config file.

# freshclam
ERROR: Please edit the example config file /etc/freshclam.conf
ERROR: Can't open/parse the config file /etc/freshclam.conf

Error is caused by the following section in the freshclam.conf configuration file.

## Example config file for freshclam
## Please read the freshclam.conf(5) manual before editing this file.
##

# Comment or remove the line below.
Example

As specified in the file, last line in this snippet, needs to be removed, or commented out, in order for “freshclam” command to work.
Line can be removed with the following command.

sed -i '/^Example$/d' /etc/freshclam.conf
Enable automatic Updates:

By default freshclam cronjob is disabled, and last line needs to be removed or commented out from /etc/sysconfig/freshclam in order for automatic updates to run.

[root@test ~]# cat /etc/sysconfig/freshclam
## When changing the periodicity of freshclam runs in the crontab,
## this value must be adjusted also. Its value is the timespan between
## two subsequent freshclam runs in minutes. E.g. for the default
##
## | 0 */3 * * *  ...
##
## crontab line, the value is 180 (minutes).
# FRESHCLAM_MOD=

## A predefined value for the delay in seconds. By default, the value is
## calculated by the 'hostid' program. This predefined value guarantees
## constant timespans of 3 hours between two subsequent freshclam runs.
##
## This option accepts two special values:
## 'disabled-warn'  ...  disables the automatic freshclam update and
##                         gives out a warning
## 'disabled'       ...  disables the automatic freshclam silently
# FRESHCLAM_DELAY=


### !!!!! REMOVE ME !!!!!!
### REMOVE ME: By default, the freshclam update is disabled to avoid
### REMOVE ME: network access without prior activation
FRESHCLAM_DELAY=disabled-warn   # REMOVE ME
[root@test ~]#

Lines can be removed with following command.

sed -i '/REMOVE ME/d' /etc/sysconfig/freshclam
Correct scan.conf file:

Same needs to be done for scan.conf file

##
## Example config file for the Clam AV daemon
## Please read the clamd.conf(5) manual before editing this file.
##


# Comment or remove the line below.
Example

Following command removes the line from scan.conf file.

sed -i '/^Example$/d' /etc/clamd.d/scan.conf

We also need to define the socket file.
If we try to run clamd, following error is returned.

[root@test ~]# clamd -c /etc/clamd.d/scan.conf
ERROR: Please define server type (local and/or TCP).
[root@test ~]#

Checking the scan.conf file, we see socket file is commented out.

# Path to a local socket file the daemon will listen on.
# Default: disabled (must be specified by a user)
#LocalSocket /var/run/clamd.scan/clamd.sock

Comment can be removed with following command.

sed -i -e 's/#LocalSocket \/var\/run\/clamd.scan\/clamd.sock/LocalSocket \/var\/run\/clamd.scan\/clamd.sock/g' /etc/clamd.d/scan.conf