Skip to content

Latest commit

 

History

History
175 lines (127 loc) · 4.06 KB

quick-commands.md

File metadata and controls

175 lines (127 loc) · 4.06 KB
Raw

Auto Mount a Device

echo /dev/nvme0n1p1 /mnt ext4 defaults 0 0 >> /etc/fstab

Performance Monitor (SAR)

  • Install and Use SAR
apt-get insall sysstat

sar 1 3

# sar log dir
cd /var/log/sa/

# Adjust period of collecting logs
vim /etc/cron.d/sysstat

*/10 * * * * root /usr/lib64/sa/sa1 1 1
# 0 * * * * root /usr/lib64/sa/sa1 600 6 &
# Generate a daily summary of process accounting at 23:53
53 23 * * * root /usr/lib64/sa/sa2 -A
  • Visualize SAR log
  1. ksar https://github.com/CentaurusM/python-sarviz
  2. sarviz https://github.com/CentaurusM/python-sarviz

CPU Turbo

yum install ncurses-devel ncurses
git clone https://github.com/ajaiantilal/i7z.git

cd i7z
make
./i7z

Configure SSH with X11 Forwarding

# /etc/ssh/sshd_config
X11Forwarding yes
yum install  xorg-x11-xauth

Show "history" with Data & Time

echo 'export HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bash_profile
source ~/.bash_profile

# Other parameters
export HISTFILESIZE=50000000
export HISTSIZE=100000
export PROMPT_COMMAND="history -a"        #实时记录历史命令，防止丢失

Axel Download Accelerator

# Debian or Ubuntu
apt-get install axel

# CentOS
yum install epel-release
yum install axel  

# Downloading with Axel
axel -n 10  http://hammurabi.acc.umu.se/debian-cd/6.0.6/amd64/iso-cd/debian-6.0.6-amd64-netinst.iso

DNS Setting in CentOS 7

  1. Using nmcli tools
nmcli connection show

NAME UUID                                 TYPE           DEVICE
eno1 5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03 802-3-ethernet eno1

nmcli con mod eno1 ipv4.dns "114.114.114.114 8.8.8.8"

nmcli con up eno1
  1. Editing the file "/etc/resolv.conf"
vim /etc/NetworkManager/NetworkManager.conf
# add "dns=none"
[main]
plugins=ifcfg-rh
dns=none

systemctl restart NetworkManager.service

vim /etc/resolv.conf
# add nameserver

nameserver 114.114.114.114
nameserver 8.8.8.8

Route Trace - BestTrace

wget https://cdn.ipip.net/17mon/besttrace4linux.zip
unzip besttrace4linux.zip
chmod +x besttrace
./besttrace -q 1 IP

PCI passthrough in centos

http://www.hanbaoying.com/2017/02/21/pci-passthrough-in-centos.html

shadowsocks linux

  1. client
yum install python-pip
pip install shadowsocks
nohup sslocal -s your_server_ip -p your_server_port -l 1080 -k your_server_passwd -t 600 -m your_encrypt-method > /dev/null 2>&1 &

# or
sslocal -c ss.json

{
    "server":"your_server_ip",      #ss服务器IP
    "server_port":your_server_port, #端口
    "local_address": "127.0.0.1",   #本地ip
    "local_port":1080,              #本地端口
    "password":"your_server_passwd",#连接ss密码
    "timeout":300,                  #等待超时
    "method":"rc4-md5",             #加密方式
    "fast_open": false,             # true 或 false。如果你的服务器 Linux 内核在3.7+，可以开启 fast_open 以降低延迟。开启方法： echo 3 > /proc/sys/net/ipv4/tcp_fastopen 开启之后，将 fast_open 的配置设置为 true 即可
    "workers": 1                    # 工作线程数
}

yum install privoxy

vim /usr/etc/privoxy/config

#edit /etc/privoxy/config
listen-address 127.0.0.1:8118
forward-socks5t / 127.0.0.1:1080 .
#end edit

systemctl start privoxy

vim /etc/profile
export http_proxy=http://127.0.0.1:8118
export https_proxy=http://127.0.0.1:8118
export ftp_proxy=http://127.0.0.1:8118

source /etc/profile
curl www.google.com

disk 性能测试

/dev/vdb为测试卷的挂载路径，查看命令为lsblk
fio -ioengine=libaio -group_reporting -direct=1 -rw=write -bs=128k -iodepth=32 -size=100G  -name=/dev/vdb
fio -ioengine=libaio -group_reporting -direct=1 -rw=randwrite -bs=4k -iodepth=128 -runtime=300 -time_based -size=100G -name=/dev/vdb
fio -ioengine=libaio -group_reporting -direct=1 -rw=randread -bs=4k -iodepth=128 -runtime=300 -time_based -size=100G -name=/dev/vdb
fio -ioengine=libaio -group_reporting -direct=1 -rw=write -bs=1024k -iodepth=32 -runtime=300 -time_based -size=100G -name=/dev/vdb
fio -ioengine=libaio -group_reporting -direct=1 -rw=read -bs=1024k -iodepth=32 -runtime=300 -time_based -size=100G -name=/dev/vdb