831jsh

Bash useful and neat snippets

Ensure a process exist

# incomplete
ps -o pid -C ssh-agent|sed -n '2p'

831jsh

Manual install

As per Kubernetes.io/docs/getting-started-guides/ubuntu/manual

Add on node0

UNFINISHED!!

curl -s -S -L https://raw.githubusercontent.com/webplatform/salt-states/master/webplatform/files/screenrc.jinja -o .screenrc

831jsh

# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Turn on execshield
# 0 completely disables ExecShield and Address Space Layout Randomization
# 1 enables them ONLY if the application bits for these protections are set to “enable”
# 2 enables them by default, except if the application bits are set to “disable”
# 3 enables them always, whatever the application bits

831jsh

CREATE USER 'backupadmin'@'localhost' IDENTIFIED BY '<secret_password>';
GRANT LOCK TABLES, SELECT ON <DB_NAME>.* TO 'backupadmin'@'localhost';
GRANT RELOAD ON *.* TO 'backupadmin'@'localhost';
GRANT CREATE, INSERT, DROP ON mysql.ibbackup_binlog_marker TO 'backupadmin'@'localhost';
GRANT CREATE, INSERT, DROP ON mysql.backup_progress TO 'backupadmin'@'localhost';
GRANT CREATE, INSERT, SELECT, DROP ON mysql.backup_history TO 'backupadmin'@'localhost';
GRANT REPLICATION CLIENT ON *.* TO 'backupadmin'@'localhost';
GRANT SUPER ON *.* TO 'backupadmin'@'localhost';
GRANT CREATE TEMPORARY TABLES ON mysql.* TO 'backupadmin'@'localhost';
FLUSH PRIVILEGES;

831jsh

Install server certificates issued by a private CA in oVirt4 Manager and Host

• generate a signing request on the system where oVirt Manager is running (the engine server)

openssl req -new -sha256 -key /etc/pki/ovirt-engine/keys/apache.key.nopass -out /tmp/engine.csr

• Submit the CSR to the issuer and wait. Or, if you are the issuer and you happen to be using FreeIPA/IdM, you may issue the certificate with ipa-admintools. For example,

831jsh

To install tcptraceroute on Debian/Ubuntu:

$ sudo apt-get install tcptraceroute

To install tcptraceroute on CentOS/REHL, first set up RepoForge on your system, and then:

$ sudo yum install tcptraceroute

831jsh

Live backup of KVM virtual machines

This script will let you make backups of live VMs running on KVM, using libvirt.

The backup job will suspend the VM for the time it takes to copy the RAM to disk.

Credits: Luca Lazzeroni

I've made some minor adjustments.

831jsh

#!/bin/bash
#

BACKUPDEST="$1"
DOMAIN="$2"
MAXBACKUPS="$3"

if [ -z "$BACKUPDEST" -o -z "$DOMAIN" ]; then
    echo "Usage: ./vm-backup <backup-folder> <domain> [max-backups]"
    exit 1

831jsh

#! /bin/sh

if [ $# -eq 0 ]
then
	echo "No arguments supplied"
	exit 1
fi


if [ -z "$1" ]

831jsh

# 0 is too far from ` ;)
set -g base-index 1

# Automatically set window title
set-window-option -g automatic-rename on
set-option -g set-titles on

#set -g default-terminal screen-256color
set -g status-keys vi
set -g history-limit 10000