dungmanh88

pt-variable-advisor localhost --user=root --ask-pass
perl mysqltuner.pl

dungmanh88

Just compare in mysqld section

pt-config-diff /etc/my.cnf.d/server.cnf h=localhost --user=root --ask-pass
pt-config-diff /etc/my.cnf.d/server.cnf /etc/my.cnf.d/server1.cnf

dungmanh88

sudo passwd username
ecryptfs-mount-private ### Enter old password
ecryptfs-rewrap-passphrase ~/.ecryptfs/wrapped-passphrase ### Enter new password
ecryptfs-unwrap-passphrase ### Recheck passphrase with new password. Passphrase is unchanged when you change your login password
Passwords and Keys > Change password of login keyring

dungmanh88

sudo blkid ### Get device
sudo cryptsetup luksOpen <device> <map-name>
sudo mount /dev/mapper/<map-name> /mnt/
sudo umount /mnt
sudo cryptsetup luksClose <map-name>

dungmanh88

lspci | egrep -i 'ethernet|network'
if you are using Intel 82574L, you should upgrade module.

Follow https://elrepo.org/tiki/tiki-index.php
sudo rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
sudo rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

sudo lsmod|grep e1000e
Output:
e1000e                230782  0

dungmanh88

dmidecode -t processor | grep -i version
dmidecode -t process | grep -i cache
dmidecode -t processor  | grep -i count
dmidecode -t processor  | grep -i capable
lscpu
uname -r
cat /etc/issue
cat /etc/redhat-*
free -m
dmidecode -t memory | grep -i "Number of devices"

dungmanh88

ELREPO: https://elrepo.org/tiki/tiki-index.php
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

EPELREPO:
yum -y install epel-release

REMIREPO: http://rpms.famillecollet.com/
rpm --import http://rpms.remirepo.net/RPM-GPG-KEY-remi

dungmanh88

useradd test
groupadd sudo_passwdless
gpasswd -a test sudo_passwdless

groups test
test : test sudo_passwdless

vi /etc/sudoers
%sudo_passwdless ALL=(ALL) NOPASSWD: ALL

dungmanh88

sudo vi /usr/local/bin/mysql_backup
#!/bin/bash

user_name=root
user_password="<pass>"
backup_name=<backup_name>
host="127.0.0.1"
parallel=4
backup_output="/data/local-backup"
temp_log="/var/log/mysql_backup.log.tmp"

dungmanh88

sudo tee /etc/yum.repos.d/docker.repo <<-'EOF'
[dockerrepo]
name=Docker Repository
baseurl=https://yum.dockerproject.org/repo/main/centos/7/
enabled=1
gpgcheck=1
gpgkey=https://yum.dockerproject.org/gpg
EOF

yum -y update && yum -y install docker-engine-1.11.2 && systemctl start docker && docker run hello-world