A ramdisk – or if you prefer, RAMdisk – is a method of taking a section of memory and treating it as disk. If you think about it for a moment, the pros/cons should be obvious: RAM is much faster than even the fastest disk, so operations on the ramdisk are much faster…
SCP is short for secure copy protocol and is used to copy files and directories between multiple Linux machines over a network. The data transferred using SCP is encrypted to protect your data against nefarious agents.
The SCP command uses SSH for data transfer and thus uses all the same usernames and passwords you would use for SSH. As a result, it is an extremely useful command for transferring files securely without too much added complexity.
In the course of my career, I’ve periodically come across code like this in shell scripts:
Or sometimes, slightly more elegantly:
The problems with the first example are obvious, especially if it appears in many different scripts. The second is better. The “$$” means “my process ID”, who if whatever script had a process ID of 5309, the TEMPFILE variable would be set to /tmp/tempfile.5309. This makes collisions between scripts extremely unlikely, but is still suboptimal. What if there is a file called /tmp/tempfile.5309 and it’s owned by another user, or what if you don’t have permission to write to /tmp? It’d be better to find out immediately than many lines later when you try to write something. …
The cp command is ideal for copying files and directories on a Linux or Unix distribution. You will likely not need to use additional options for most tasks as the basic command will achieve most requirements.
This tutorial will take you through several use cases for using cp on a Linux distribution. For example, we cover copying single files, copying multiple files and directories, setting backups, copying recursively, and much more.
The following concepts modernize your automation scripts with some lesser-known modern Bash scripting techniques.
Keep a script running forever over SSH.
This guide explains how to use date command in Bash scripting and how to work with date and time in shell scripts in Linux.
This tutorial explains what is Bottles, how to install Bottles in Linux and how to manage and run windows software with Bottles in Linux.
In this tutorial, you will learn how to use both the nice command and renice command on a Linux system.
I need to replace a string in a lot of files in a folder, with only ssh access to the server. How can I do this?