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Scp stands for secure copy and allows you to copy files between hosts on a network. One way you can use scp is to copy a file from your machine to a remote server or vice versa. Scp works with SSH.

However, if you’d want to become more comfortable on the command line there are certain commands that you should know. Basic, yet essential, commands that you should be aware of as a developer. Knowing these commands is required in order to build a strong foundation when it comes to working on the command line.

Cliché to say, but it’s true that most data scientists spend 70–80% of their time in data clean up before doing any advanced analytics. Even experienced programmers spend a significant amount of time on the internet (i.e. StackOverflow) searching for the right code or syntax for their project. Having an old-fashioned cheatsheet — whether printed on papers or written in a Jupyter notebook — is still a valuable asset. Having the most frequently used codes in one place can save a significant amount of time and energy.

Every developer knows that cd is one of the most frequently used commands on the Linux command line. This command probably doesn’t need any further explanation. However, a lot of developers don’t know about a great option that comes with the cd command: the hyphen.

Knowing your way around the terminal is one way to get things done faster. Instead of using your mouse to click around in a GUI, you could just get the exact same job done on the command line — but way faster.

You probably have heard about the cat command which allows you to see the contents of a file. But you’ve got more options when it comes to showing the contents of a file. The cat command outputs the entire file which is not always what you want.

Sometimes you only want to output the first or last X number of lines. You could use the tail or head command for this. The head command outputs the first 10 lines by default, whereas the tail command outputs the last 10 lines.

The tail command often gets used for watching a log file. This is due to the fact that the tail command has got an -f option, which stands for “follow”, that allows you to watch a file. This option will output appended data as the file grows. This means that log entries that get appended to the file will be displayed immediately.

If you know SQL I don’t have to explain how important joining is. Python and pandas have some functions such as merge(), join(), concat() for SQL style joining. If SQL is the primary database you probably won’t have to do joining much in Python, but nevertheless you should add the following codes to your cheatsheet.

In this example, derk is the user and 127.0.0.1 is the host. The address of the host is followed by a colon. After the colon, you specify the path to the file that needs to be copied. The second argument is the destination which in this case is a folder on your own machine. The result of this command is that file.txt gets copied from the server to your local machine’s ~/destination folder.

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experience of bootcamps but my impression is that they often only provide shallow knowledge of one or two languages and some frameworks but leave giant gaping holes in your understanding of computer science and programming as a whole. Not saying they are all like this, joining one might be a great choice for you but don’t assume that you will leave knowing everything you need to.

The command is fairly straightforward and works just like the cp command. The only difference is that you can copy files to other hosts with scp which isn’t possible with the normal cp command.

Cliché to say, but it’s true that most data scientists spend 70–80% of their time in data clean up before doing any advanced analytics. Even experienced programmers spend a significant amount of time on the internet (i.e. StackOverflow) searching for the right code or syntax for their project. Having an old-fashioned cheatsheet — whether printed on papers or written in a Jupyter notebook — is still a valuable asset. Having the most frequently used codes in one place can save a significant amount of time and energy.

This can be useful when downloading a database backup from the server, for example. If you want to upload something from your machine to the remote host you switch around the parameters.

This article is perfect for you if you’re trying to become more comfortable on the Linux command line. It’s perfectly fine if you don’t have that much experience under your belt using the command line, yet. Don’t worry if you’re already comfortable with working on the Linux command line. There still might be a thing or two that you could learn.