Quack~ zoonderkins

certbot certonly --standalone -d dns.de.blahdns.com -d svr5.ookangzheng.com -d doh.de.blahdns.com

nginx.conf

user www-data;
worker_processes auto;
pid /run/nginx.pid;

Dump dns

tcpdump -i ens3 -nt -s 500 port domain

with some domain

tcpdump -i ens3 -nt port 53 | grep dns.msftncsi.com

https://jaminzhang.github.io/dns/use-tcpdump-to-analyze-dns-communication/ https://cristom50.wordpress.com/2015/03/19/monitoring-dns-queries-with-tcpdump/

systemctl disable <service> If you are not using systemd (Ubuntu 14.10 and earlier) use:

update-rc.d -f <service> remove The following command will give you a list of all services on your machine:

service --status-all Example disable Nginx

systemctl disable nginx

Debian | Ubuntu enable SWAP

swapon --show

Check free memory and disk

df -h

新闻w

RHEL 7 发布应该算是比较大的新闻了吧~

人民群众纷纷表示红帽步子太大不要扯着蛋了比较好...

F_XZ: 完全没关心...

猫注意的新功能有 virtio 等 KVM 优化, docker 支持, 以及 ruby 2.0, python 2.7, java 7 之类的吧

Some useful securing SSH on Linux

// Secure ssh with changing port

nano /etc/ssh/sshd_config
Port 2222
...

# Restart sshd service and add port to firewall

Install I2P
- Download I2P
- java -jar i2pinstall_*.jar
Install Java Service Wrapper
- Download Community Version
- tar xzf wrapper-*.tar.gz
- cp wrapper*/bin/wrapper /Applications/i2p/i2psvc
- cp wrapper*/lib/wrapper.jar /Applications/i2p/lib
- cp wrapper*/lib/libwrapper.so /Applications/i2p/lib
Try to start I2P using /Applications/i2p/i2prouter start or Start I2P Router app

Disk IO

# Terminal method

hdparm -Tt /dev/sda

time sh -c "dd if=/dev/zero of=ddfile bs=8k count=250000 && sync"; rm ddfile

dd if=/dev/zero of=/tmp/output bs=8k count=10k; rm -f /tmp/output

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	//app.component.html
	<ul>
	<li *ngFor="let course of (courses$ \| async)">
	{{course}}
	</li>
	</ul>
	<p>
	{{ (course$ \| async \| json) }}
	</p>