Shadowsocks-libev 服务无法正常启动 libmbedcrypto

cnetos 7.0中，shadowsocks-libev照常安装完毕，发现无法正常启动

其中可以试一试以下的解决办法：

cd  /usr/lib64

ln -s libmbedcrypto.so.1  libmbedcrypto.so.0

Centos7 yum方式升级内核

cat /etc/system-release

cat /etc/issue

uname -r

一、安装elrepo的yum源
升级内核需要使用elrepo的yum源，在安装yum源之前还需要我们导入elrepo的key，如下：

rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

elrepo的key安装完毕后，我们下面开始正式升级内核。

How to install shadowsocks-libev on Centos 7

The following unofficial repositories are provided as-is by owner of this project. Contact the owner directly for bugs or issues (IE: not bugzilla).

Release	Architectures	Repo Download
Epel for  CentOS 6	i386 (25)*, x86_64 (76)*	Epel 6 (6170 downloads)
Epel for  CentOS 7	x86_64 (313)*	Epel 7 (5555 downloads)
Fedora 25	i386 (0)*, x86_64 (17)*	Fedora 25 (0 downloads)

Install DenyHost On CentOS 6&7

Download the EPEL repository with the following command:

• sudo rpm -Uvh http://mirror.metrocast.net/fedora/epel/6/x86_64/epel-release-6-8.noarch.rpm
• sudo rpm -Uvh http://mirror.metrocast.net/fedora/epel/7/x86_64/Packages/e/epel-release-7-11.noarch.rpm

Install the Deny Hosts package with the following:

• sudo yum install denyhosts

You can further configure any settings in the DenyHosts.conf file by going to the following and updating according to your preference.

• nano /etc/denyhosts.conf

How to create systemd unit file aria2.service

nano /etc/systemd/system/aria2.service

[Unit]
Description=Aria2
After=syslog.target
After=network.target

[Service]
Type=forking
ExecStart=/usr/bin/aria2c –conf-path=/root/.aria2/aria2.conf

Restart=always

[Install]
WantedBy=multi-user.target

How to create systemd unit file calibre.service

nano /etc/systemd/system/calibre.service

[Unit]
Description=Calibre Service
After=network.target

[Service]
ExecStart=/usr/bin/calibre-server\
–enable-use-bonjour \
–port 8080 \
–log=/opt/calibre/calibre.log \
/root/calibre-library

[Install]
WantedBy=multi-user.target

CentOS7安装PHP最新版

yum -y remove php*

rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

rpm -Uvh https://mirror.webtatic.com/yum/el7/webtatic-release.rpm

yum -y install php72w php72w-cli php72w-common php72w-devel php72w-embedded php72w-fpm php72w-gd php72w-mbstring php72w-mysqlnd php72w-opcache php72w-pdo php72w-xml

Deploy Google BBR on CentOS 7

centos kernel version must 4.9 or newest

echo ‘net.core.default_qdisc=fq’ | sudo tee -a /etc/sysctl.conf

echo ‘net.ipv4.tcp_congestion_control=bbr’ | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

sudo sysctl net.ipv4.tcp_available_congestion_control

sudo sysctl -n net.ipv4.tcp_congestion_control