rm -rf /var/lib/rpm/__db*
rpm –rebuilddb
rpmdb_verify Packages
OR:
cp -v Packages Packages-BAKUP
db_dump Packages-BAKUP | db_load Packages
rpm -qa
rpm –rebuilddb
fix corrupted RPM database
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Monthly Archives: November 2014
mysql enable slow query log without restarting
set global slow_query_log_file = ‘/full/path’;
downgrade from debian SID to stable
vi /etc/apt/sources.list
deb http://security.debian.org/ wheezy/updates main
deb-src http://security.debian.org/ wheezy/updates main
deb http://cdn.debian.net/debian/ wheezy main contrib non-free
deb-src http://cdn.debian.net/debian/ wheezy main contrib non-free
vi /etc/apt/preferences
Package: *
Pin: release a=stable
Pin-Priority: 1001
AND:
apt-get update
apt-get upgrade
apt-get dist-upgrade
linux find the zombies
ps aux | grep ‘Z’
ERROR 1123 (HY000): Can’t initialize function ‘TokuDB’; Plugin initialization function failed
Fix. echo never > /sys/kernel/mm/transparent_hugepage/enabled
MariaDB [(none)]> INSTALL SONAME ‘ha_tokudb’;
Query OK, 0 rows affected, 1 warning (2.35 sec)
cPanel update rvsitebuilder
perl /usr/local/cpanel/whostmgr/docroot/cgi/rvsitebuilderinstaller/autoinstaller.cgi
google chrome delete URL history
In address bar type: chrome://history-frame
Perform the search query of your URL address
Push: ctrl+shift+i and paste this code:
var inputs = document.getElementsByTagName('input');
for (var i = 0; i < inputs.length; ++i) {
if (inputs[i].type == "checkbox"){
inputs[i].checked = true;
}
}
document.getElementById("remove-selected").disabled = false
Remove selected items button.
cpanel disable cphulkd for 8 minutes
/usr/local/cpanel/etc/init/stopcphulkd
also you can disable it:
rm -f /var/cpanel/hulkd/enabled
python syntax validator
python -m py_compile your_python.py
/etc/init.d/ssh: xmalloc: ../bash/parse.y:4941: cannot allocate XXXXXX bytes (0 bytes allocated)
free -m
kill some memory hungry applications
/usr/sbin/sshd
sshd re-exec requires execution with an absolute path
whereis ssh
/usr/sbin/sshd
sh: /tmp/sh: No such file or directory
> /tmp/sh
/etc/init.d/ssh restart
SSH: Write Failed: broken pipe
In you local computer set this:
vi /etc/ssh/ssh_config
Host *
ServerAliveInterval 120
Dockerfile for systemd
FROM centos:centos7
MAINTAINER “you”
ENV container docker
RUN yum -y swap — remove fakesystemd — install systemd systemd-libs
RUN yum -y update; yum clean all; \
(cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i ==
systemd-tmpfiles-setup.service ] || rm -f $i; done); \
rm -f /lib/systemd/system/multi-user.target.wants/*;\
rm -f /etc/systemd/system/*.wants/*;\
rm -f /lib/systemd/system/local-fs.target.wants/*; \
rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
rm -f /lib/systemd/system/basic.target.wants/*;\
rm -f /lib/systemd/system/anaconda.target.wants/*;
VOLUME [ “/sys/fs/cgroup” ]
CMD [“/usr/sbin/init”]
docker build –rm -t centos7-systemd .
FROM centos7-systemd
RUN yum -y install httpd; yum clean all; systemctl enable httpd.service
EXPOSE 80
CMD [“/usr/sbin/init”]
We build once again:
docker build –rm -t centos7-systemd/httpd .
To put this all together and run httpd with systemd in Docker, we do this:
docker run --privileged -ti -v /sys/fs/cgroup:/sys/fs/cgroup:ro -p 80:80 centos7-systemd/httpd
change fakesystemd with systemd
yum swap — remove fakesystemd — install systemd systemd-libs