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Sysadmin

Server and desktop tips, help, and how-tos for Mac, Linux, and Windows.

Find Directory Sizes in a Folder

October 16, 2019 mike Sysadmin

Finding the recursive sizes of folders and their contents in summary is easy with the disk usage (du) command. Output will look something like this.

Find Ubuntu Version at the Command Line

January 18, 2019 mike Sysadmin

Finding your current version of Ubuntu is simple. Output will look something like this. No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04.1

A Guide to Finding Files on Linux and Mac

December 30, 2018 mike Sysadmin

A few creative ways to use the find shell command. Case insensitively look for a file named your_file_name.txt Using wild cards – Case insensitively look

Command to Find Which Shell I’m Currently Using

December 29, 2018 mike Sysadmin

This will work on any linux/unix variety and mac os. Output will look something like this. -bash

How to get a Summary of Every File Type in a Folder at the Command Line

December 17, 2018 mike Sysadmin

This command will work on Linux and MacOS. Here we’re running it on our downloads folder to get a summary of every type of file

Fix SSH Key Permissions (Permissions are too open private key will be ignored)

November 26, 2018 mike Sysadmin

Sometimes you’ll get an error on your ssh client when you’re working with a new ssh key and you’re trying to ssh into the server.

Listing Files Only With Grep Command

August 5, 2018 mike Sysadmin

To only show the file names and not a preview of data add the command line param -l to grep. The below example searches in

Using Ghostscript CLI to Shrink a PDF

May 17, 2018 mike Sysadmin

Shrinking a PDF with Ghostscript is easy in Linux. Below are 3 ghostscript commands to shrink PDFs to a few different levels. screen – lowest

How to Remove Duplicate Lines From a Text File In Linux

January 30, 2018 mike Sysadmin

You can combine the sort and uniq command line programs to remove duplicate lines from a text file. In the example below, it will produce

How to Jump to a Line Number in VI Editor

January 28, 2018 mike Sysadmin

To go to a specific line number in VI, first, make sure you’re not in editing mode by hitting ESC. Next type the line number

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