placek

# openssl version
openssl version

# openssl commands
openssl list-standard-commands
# ca - create certificate authorities
# dgst - compute hash functions
# enc - encrypt/decrypt using secret key algorithms (it is possible to generate using a password or directly a secret key stored in a file)
# genrsa - generate a pair of public/private key for the RSA algorithm
# password - generation of “hashed passwords”

SimonSun1988

## 安裝語系檔

`$ sudo locale-gen "en_US.UTF-8"`

## 重新設定語系檔

`$ sudo dpkg-reconfigure locales`

## 設定檔

luckydev

# maximum capability of system
user@ubuntu:~$ cat /proc/sys/fs/file-max
708444

# available limit
user@ubuntu:~$ ulimit -n
1024

# To increase the available limit to say 200000
user@ubuntu:~$ sudo vim /etc/sysctl.conf

fearblackcat

Shadowsocks Proxy

Server-side setup

apt-get install python-pip
pip install shadowsocks

sudo ssserver -p 443 -k password -m aes-256-cfb --user nobody -d start