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Sysadmin

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

word count wc

Count Number of Lines in a File

December 15, 2016 mike Sysadmin

Back to basics with this one, the linux wc command (word count) can be used to count lines, words and bytes in a file and

ls command

Print the Newest File in a Given Directory and Other Directory Listing Examples

December 15, 2016 mike Sysadmin

Linux directory listing command ls is another must. This command lists files oldest to newest piped to grep which excludes directories piped to awk which

How to Use Grep Combined with Standard Output From Other Commands

December 14, 2016 mike Sysadmin

Grep is often most powerful when examining the output of other shell commands. This example searches the Linux processes from the ps command for apache.

sort linux

Figuring Out Linux sort By Examples

December 14, 2016 mike Sysadmin

The Linux sort – it’s incredibly fast, runs well on files larger than ram, and a must to master for any good sysadmin. Here are

How to Recursively List Out Files In a Directory in Linux

December 13, 2016 mike Sysadmin

A few examples on using the Linux find command to list out all files matching a file type. The find command is on just about

Simple Command to Find Which Version of Redhat/CentOS You’re Running

December 13, 2016 mike Sysadmin

Finding out the version of redhat or centOS you’re running is easy, you simple cat out the release version file standard on any red hat

How to Check Ubuntu Kernel Version with uname

December 13, 2016 mike Sysadmin

The uname shell command will print out in any Debian or RedHat variant like Ubuntu and Centos Linux much of the main system information, here

iphone pin code

You have a 23.34% Chance of Guessing a Four Digit Pin Combination

December 12, 2016 mike Sysadmin

According to Datagenetics 10.71% of 4 digit passcodes are 1234. Data Genetics did some number crunching on ATM pin data, not sure how they got

How to View Processes and Their Respective Ports on Linux and OSX

December 11, 2016 mike Sysadmin

If you want to see what processes are listening on what ports these you can use the linux command lsof and netstat. Below are a

How to Watch For a Process to End on Ubuntu Linux

December 9, 2016 mike Sysadmin

I wanted to send myself a text when a long running process was done so I needed a command that would watch for a process

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