Today from early morning I was called by my colleague who said that his centos6 box can’t boot after reboot. After grub screen centos show that error:
RAMDISK: incomplete write (6257 != 32768)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Pid: 1, comm: swapper not tainted %kernel_ver% #1
Let fix that.
Continue reading “RAMDISK: incomplete write, kernel panic on centos”
Hey. I’m already has mariadb installed but it was 5.x version. Today actual version 10.3.x. Lets upgrade!
yum remove mariadb-server mariadb-libs
Continue reading “Upgrading MariaDB on Centos7”
Ok. After fresh install of centos I usually make two commands first
yum remove posftix sendmail
yum install ssmtp
So I just understand that root (and other users mail) I never receive! Lets fix it. Open /etc/aliases with you favorite nano and scroll to the bottom of the file
# Person who should get root's mail
After that lets test
echo "test message" | mail root
Check firstname.lastname@example.org. Thats all!
Install elrepo & new kernel
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install kernel-ml -y
Lets understand in which position our new kernel installs. Rows begins with 0, so if you see new kernel on the top you should choose grub-set-default 0
egrep ^menuentry /etc/grub2.cfg | cut -f 2 -d \'
Continue reading “Installing Kernel 5.X with Google BBR support in centos7 box”
Lets add blacklist feature to our Asterisk. We will use AstDB (CFIM/blacklist).
First of all lets add ability to add and remove numbers to our blacklist.
Open /etc/asterisk/extensions.conf via your favorite editor (nano, huh?)
Continue reading “Adding blacklist feature to Asterisk 16”
My name is Klim and I am system administrator. I am not English-native-speaker and you may have some troubles while reading my blog (if you will read it huh).
But I will try my best. Look forward to see you on that page again.