ufw
The Uncomplicated Firewall (ufw) is a user-friendly interface for managing netfilter, the standard firewall utility included with most Ubuntu and Debian-based Linux…
Linux
PowerDNS
Install PowerDNS Install PowerDNS on Ubuntu 20.04 PowerDNS Command line List all DNS Zones pdns_control list-zones pdns_control list-zones slave Delete a DNZ…
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 ~ .*” Get stats…
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 Charles HTTP…
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 status sysstat…
hdd
blkidChecking NVMe DiskNo space left on devicesmartctlsfdiskSetup ZFS file system in UbuntuResize Amazon EC2 Boot DiskPartitioning hard disk for backupResize a linux…
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: cannot 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 IPv6 config…
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 ! to override)…
vim
Vim 8 goes Visual Mode on right click vim E509: Cannot create backup file (add ! to override) Install vim from source…
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 text to…