ufw
ufw is firewall in Ubuntu. To enable To list available apps, run To see the status, run To see firewall
PowerDNS
Install PowerDNS Install PowerDNS on Ubuntu 20.04 PowerDNS Command line List all DNS Zones Delete a DNZ Zone To notify
btc
See crypto-currency
varnish
How to change varnish port in Ubuntu To clear cache, run Get stats See Varnish logs To view logs for
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 Enable and start sysstat Allow several minutes to collect data, then you will be
hdd
blkid Checking NVMe Disk No space left on device smartctl sfdisk Setup ZFS file system in Ubuntu Resize Amazon EC2
No space left on device
On a server, when creating new files, i get error – “No space left on device”. Check disk space with
Disable IPv6
To disable IPv6, edit Add following run Related Posts apt force IPv4
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