btc

See crypto-currency

varnish

How to change varnish port in Ubuntu To clear cache, run /usr/bin/varnishadm -S /etc/varnish/secret -T 127.0.0.1:6082 “ban req.http.host ~ .*”

proxy

Squid ShadowSocks Tor Reverse proxy proxychains Web Proxy debugging proxy Install mitmproxy proxy OWASP Zed Attack Proxy Project https://www.telerik.com/fiddler https://portswigger.net/burp

install sysstat on centos

To install sysstat/sar on CentOS, run yum install sysstat Enable and start sysstat systemctl enable sysstat systemctl start sysstat systemctl

Amazon RDS ERROR 1040 (08004): Too many connections

On an Amazon RDS Aurora data base, when i connect, i get error root@ip-10-0-0-234:/var/www/html# mysql -h sok.cb21y0qmezhd.us-west-2.rds.amazonaws.com -u sok_wp -p0ZEkrkQx

hdd

blkidChecking NVMe DiskNo space left on devicesmartctlsfdiskSetup ZFS file system in UbuntuResize Amazon EC2 Boot DiskPartitioning hard disk for backupResize

No space left on device

On a server, when creating new files, i get error – “No space left on device”. root@sok:~# touch 2 touch:

Disable IPv6

To disable IPv6, edit vi /etc/sysctl.conf Add following net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 run sysctl -p

vim E509: Cannot create backup file (add ! to override)

When i save file on a server in vim, i get error “FILE_NAME.EXTN” E509: Cannot create backup file (add !

vim

Vim 8 goes Visual Mode on right click vim E509: Cannot create backup file (add ! to override) Install vim

Vim 8 goes Visual Mode on right click

Vim 8 shipped with Fedora 25 and Debian 9 when you mouse right click or use middle button to insert

apt error after MariaDB to MySQL change

I have install MariaDB on a Ubuntu 16.04 server. Then installed Virtualmin, that require MySQL, so it removed MariaDB and