Tag Archives: cent os

How to delete a single command from history on a Linux, OS X and Unix Bash shell

How to delete a single command from history on a Linux, OS X and Unix Bash shell

I‘m working in Ubuntu bash terminal application and remotely on a RHEL server in cloud platform. I typed the wrong and dangerous command. I no longer wish to remember dangerous command in the history file. How can I remove or delete a single command from bash history file?
Halal Vitamins

Powered by WPeMatico

Book Review: Tarsnap Mastery Online Backup For the Truly Paranoid

Book Review: Tarsnap Mastery Online Backup For the Truly Paranoid
Tarsnap Mastery: Online Backups for the Truly Paranoid (IT Mastery) It’s always a good idea to keep backups of all of your data in multiple places. Every Linux or Unix sysadmin must master the art of backups if you want to keep your data forever. Most sysadmin recommend and follows the 3-2-1 rule:

  1. At least three copies of data.
  2. In two different formats.
  3. With one of those copies off-site.

Tarsnap is one of such off-site backup sites. It’s a secure online backup system for UNIX-like system. This service encrypts and stores data in Amazon S3. To use Tarsnap perfectly and feel secure about your backups, you need the “Tarsnap Mastery” book by Michael W. Lucas. It is no secret that I’m a big fan of his book series. Let’s see what the book is all about.
Halal Vitamins

Powered by WPeMatico

How To Read CPUID Instruction For Each CPU on Linux With x86info and cpuid Commands

How To Read CPUID Instruction For Each CPU on Linux With x86info and cpuid Commands

Is there a CPU-Z like a freeware/open source software that detects the central processing unit (CPU) of a modern personal computer in Linux operating system? How can I get detailed information about the CPU(s) gathered from the CPUID instruction, including the exact model of CPU(s) on Linux operating system?
Halal Vitamins

Powered by WPeMatico

How to Force Apache To Show a HTTP-410 Gone Status Code

How to Force Apache To Show a HTTP-410 Gone Status Code

I removed www.example.com/foo/file.html from my domain. But, it is still being crawled by Google/Yahoo and many other bots. How do I return a HTTP-410 gone error i.e. tell these bots that resource permanently does not exist using Apache HTTPD server on a CentOS/RHEL/Fedora/Ubuntu/Debian and Unix-like operating system?
Halal Vitamins

Powered by WPeMatico

How to install Composer on Debian / Ubuntu Linux

How to install Composer on Debian / Ubuntu Linux

I‘m trying to upgrade my Mediawiki installation and I’m getting an error that read as follows:
    Error: your composer.lock file is not up to date, run “composer update” to install newer dependencies How do I install composer command for my PHP installation on Debian or Ubuntu Linux running LAMP or LEMP stack? How do I Install and use Composer on running Ubuntu Linux server and fix this problem for mediawiki installation and/or manage and install PHP packages and dependencies for my project?
Halal Vitamins

Powered by WPeMatico