Computer Tips - How can I securing delete a file?

Date: 2018jan1 OS: Linux Distro: RedHat/Fedora/CentOS Q. How can I securing delete a file? A. The command `srm` is in package srm.x86_64 : Secure file deletion The command `shred` in package coreutils : A set of basic GNU tools commonly used in shell scripts The command `wipe` is in package wipe: Secure file erasing tool The command `nwipe` in in package nwipe : Securely erase disks using a variety of recognized methods