linux and git records

Clear the history of a file on Github

git filter-branch --force --index-filter 'git rm --cached --ignore-unmatch app/img/*' --prune-empty --tag-name-filter cat -- --all

git push origin master --force

rm -rf .git/refs/original/

git reflog expire --expire=now --all

git gc --prune=now

git gc --aggressive --prune=now

Use iconv to convert large file encoding to GB2312 - UTF8

iconv -f gb2312 -t utf-8//IGNORE av-ed2k-collection.data > Japanese teaching.txtwc - l Japanese teaching.txt av-ed2k-collection.data

Limit the number of requests per unit time of a single IP on Nginx, and the number of concurrent connections of a single IP

http {

limit_req_zone $binary_remote_addr zone=one:10m rate=8r/s;

server {
    location /search/ {
        limit_req zone=one burst=5;
    }

Use Nginx to limit page access permissions

sudo apt-get install apache2-utils
sudo htpasswd -c /etc/nginx/.htpasswd myusername
server {
  listen       80;
  server_name  ip_address;

  location /backend {
      root   /var/www/sunzhongwei.com;
      index  index.html index.htm;

      auth_basic "Restricted";                                
      auth_basic_user_file /etc/nginx/.htpasswd;  
  }
}

sudo /etc/init.d/nginx reload

Command line Log in to github

ssh-keygen -t rsa -C "mail"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/MZero/.ssh/id_rsa):

Log in to github. Click Account Settings in the upper right corner—>SSH and GPG keys—> new SSH key
$ ssh -T git@github.com
If there is a You've successfully authenticated prompt, it means it was successful

git pull/push project The solution to always prompting to enter username and password

git config --global credential.helper store

Server settings allow mysql remote login

vi /etc/sysconfig/iptables

-A INPUT -m state -- state NEW -m tcp -p tcp --dport 3306 -j ACCEPT
service iptables restart
grant all on aaa.* to "root"@xx .yy.zz.cc identified by "123";
flush privileges;
grant all on aaa.* to "root"@"%" identified by "123";

ssh configuration key login

ssh-keygen -t rsa -C "you@homestead"

$ sudo vim /etc/ssh /sshd_config
RSAAuthentication yes
PubkeyAuthentication yes
AuthorizeKeyFile ~/.ssh/authorized_keys
service sshd restart
Append the contents of the public key file to the ~/.ssh/authorized_keys file, and set the file permissions to 600
chmod 600 ~/ .ssh/authorized_keys

$ vim .bash_profile
alias c14='ssh [username]@[server_ip] (-i ~/.ssh/[private key file])'
$ source .bash_profile
$ c14

Solutions to Nginx reporting 502

nginx error reporting, check the nginx log to troubleshoot
nginx reporting 502 bad gate way is usually because php-fpm is not configured properly
Restart after modifying the nginx or php-fpm configuration file to take effect

nginx Add https And http2 module support

curl https://nginx.org/download/ng... |
tar xzf - && cd nginx-* # get latest nginx & extract it
./configure [old_config_arguments] --with-http_ssl_module --with-http_v2_module # The previous [old_config_arguments] can be copied from nginx -V
make
sudo make install
listen 443 ssl http2;
ssl_certificate /home/brook/ssl/chained.pem;
ssl_certificate_key /home/brook/ssl /domain.key;
ssl_dhparam /home/brook/ssl/dhparams.pem;
ssl_ciphers EECDH+CHACHA20:EECDH+CHACHA20-draft:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES: RSA+ 3DES:!MD5;
ssl_prefer_server_ciphers on;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_session_cache shared:SSL:50m;
ssl_session_timeout 1d;
ssl_session_tickets on;
add _header Strict-Transport-Security max-age=31536000;
service reload nginx

pphpmyadmin missing mcrypt extension

sudo apt-get install php-mcrypt libmcrypt libmcrypt-devel
sudo ln -s /etc/php5/mods-available/mcrypt.ini 20-mcrypt.ini
sudo service apache2 restart

How to view request response time using curl command

curl -o /dev/null -s -w %{time_namelookup}::%{time_connect}::%{time_starttransfer}::%{time_total}::%{speed_download} "n" http://www.36nu.com

0.014::0.015::0.018::0.019::1516256.00

Use github to display your front-end page

Create a project and create a new gh-pages branch through http:/ /(user_name|org_name).g... Access
A simpler way to achieve it: upload the code to the warehouse and configure GitHub Pages in the settings to the branch you want to display