UNIX Quick Hit

UNIX Quick Hit

 I was doing some work on the command line and thought it would be helpful to list out some useful Unix tidbits.
List files in human readable format

$ ls -lhS

-l     use a long listing format
-h     with -l, print sizes in human readable format (e.g., 1K 234M 2G)
-S     sort by file size

 You can use man ls to see all possible parameters

FIND

 Recursively find all files with extension .pyc

 $ find <directory> -type f -name "*.pyc"

For example, if you were looking for all .pyc files in your local directory and all sub directories you would type

 $ find . -type f -name "*.pyc"
How to Create an SSH Shortcut

 If you find yourself ssh'n to the same host repeatedly, I recommend creating a shortcut for this command in the config file in your .ssh directory.

$ cd ~/.ssh
$ vim config

 From here, you can now create shortcuts. You can specify the hostname, username, port, and the private key. For a full list of options, visit the official docs. Here's an example of how to structure the file:

Host example2
    HostName example.com
    User root

 Host example3
    HostName 64.233.160.0
    User userxyz123
    Port 56000
    IdentityFile /Users/myuser/Documents/mypem.pem



Now, you can simply SSH into any of these servers with these simple commands:

 $ ssh example2

$ ssh example3

SCREENS
An easy way to keep processes running even when you close a window or disconnect from a server. I'm not going to go full on into screens because honestly I don't use them that much. Check here if you are interested




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