show only down hosts:
nmap -sn -oG - 10.11.12.0/24 -v | grep Down
nmap show only down hosts
Leave a reply
Monthly Archives: December 2015
[alert] (EAI 2)Name or service not known: mod_unique_id: unable to find IPv4 address of “server.hostname.com”
echo "xx.xx.xx.xx server.hostname.com" >> /etc/hosts
Where xx.xx.xx.xx server IP address
/etc/init.d/httpd star
datacenter uptime
Tier 1: Guaranteeing 99.671% availability
Tier 2: Guaranteeing 99.741% availability
Tier 3: Guaranteeing 99.982% availability
Tier 4: Guaranteeing 99.995% availability
Tier 1 = Non-redundant capacity components (single uplink and servers).
Tier 2 = Tier 1 + Redundant capacity components.
Tier 3 = Tier 1 + Tier 2 + Dual-powered equipments and multiple uplinks.
Tier 4 = Tier 1 + Tier 2 + Tier 3 + all components are fully fault-tolerant including uplinks, storage, chillers, HVAC systems, servers etc. Everything is dual-powered.
php append to file
$txt = "user id date";
$myfile = file_put_contents('logs.txt', $txt.PHP_EOL , FILE_APPEND);
linux find files created today
find `pwd` -mtime -1 -type f -print
chrome delete cookies domain
chrome://settings/cookies
volume80.value U
su - munin -s /bin/bash
munin-run --debug apache_processes
busy80.value 29
idle80.value 14
free80.value 407
If you are getting something like
busy80.value U
idle80.value U
free80.value U
Error: Bytecode loader failed. See troubleshooting for details: http://installatron.com/troubleshooting
/usr/local/installatron/repair --stable
directadmin delete messages
cd /usr/local/directadmin/data/admin && echo -n "" > tickets.list