Linux download file shell

Similar tail prints the last 10 lines of a file. Today we learned about various ways to display the contents of a file in the Linux command line. If you know any other cool way to display file contents in the command line, do share it with everyone in the comments below! Save my name, email, and website in this browser for the next time I comment. As an example stolen straight from the documentation , given a sample.

It's possible to pass a small script to some interpreters, like Python. As a bonus, it'll parse Jekyll's front matter just fine. This version supports the - notation and the short notation for dictionaries and lists. The following input:. In bash there are no multidimensional arrays, so this is one way to work around.

Multiple levels are supported. To work around the problem with trailing white spaces mentioned by briceburg one should enclose the values in single or double quotes.

However, there are still some limitations: Expansion of the dictionaries and lists can produce wrong results when values contain commas. Also, more complex structures like values spanning multiple lines like ssh-keys are not yet supported.

The second sed call does the same for the short notation of lists and converts [ entry, The third sed call is the original one that handled normal dictionaries, now with the addition to handle lists with - and indentations. The awk part introduces an index for each indentation level and increases it when the variable name is empty i. The current value of the counters are used instead of the empty vname.

When going up one level, the counters are zeroed. Edit: I have created a github repository for this. Moving my answer from How to convert a json response into yaml in bash , since this seems to be the authoritative post on dealing with YAML text parsing from command line.

I would like to add details about the yq YAML implementation. Since there are two implementations of this YAML parser lying around, both having the name yq , it is hard to differentiate which one is in use, without looking at the implementations' DSL. There two available implementations are. Both are available for installation via standard installation package managers on almost all major distributions. Both the versions have some pros and cons over the other, but a few valid points to highlight adopted from their repo instructions.

Which is pretty straightforward. As of today Dec 21st , yq v4 is in beta and supports much powerful path expressions and supports DSL similar to using jq.

Read the transition notes - Upgrading from V3. Hard to say because it depends on what you want the parser to extract from your YAML document. For simple cases, you might be able to use grep , cut , awk etc.

I just wrote a parser that I called Yay! Yaml ain't Yamlesque! However, to quote the OP, if you want a structured configuration file which is as easy as possible for a non-technical user to edit that is YAML-like, this may be of interest.

It's inspred by the earlier answer but writes associative arrays yes, it requires Bash 4. It does so in a way that allows the data to be parsed without prior knowledge of the keys so that data-driven code can be written. This is an example of Yamlesque:.

Here is an example showing how to use it:. And here is the parser:. There is some documentation in the linked source file and below is a short explanation of what the code does. Next, it determines the dataset prefix , either explicitly specified or derived from the file name. It writes valid bash commands to its standard output that, if executed, define arrays representing the contents of the input data file.

The first of these defines the top-level array:. Note that array declarations are associative -A which is a feature of Bash version 4. Declarations are also global -g so they can be executed in a function but be available to the global scope like the yay helper:. The input data is initially processed with sed. It drops lines that don't match the Yamlesque format specification before delimiting the valid Yamlesque fields with an ASCII File Separator character and removing any double-quotes surrounding the value field.

The two expressions are similar; they differ only because the first one picks out quoted values where as the second one picks out unquoted ones. The result is piped into awk which processes its input one line at a time. It uses the FS character to assign each field to a variable:. All lines have an indent possibly zero and a key but they don't all have a value. It computes an indent level for the line dividing the length of the first field, which contains the leading whitespace, by two.

The top level items without any indent are at indent level zero. Next, it works out what prefix to use for the current item. This is what gets added to a key name to make an array name. For the top level indent level zero the data set prefix is used as the parent key so it has no prefix it's set to "". From the Linux bash window that you opened earlier, type the following commands to install the required packages.

You can put multiple packages on one line: sudo apt-get install csh libfontconfig gfortran libgfortran3 sudo apt-get install libxrender-dev libxdev libxrender1 sudo apt-get install libssh libgomp1 sudo apt-get install firefox imagemagick Note that the firefox and imagemagick packages are not required, but useful.

Imagemagick gives you the powerful "convert" command for converting and post-processing graphical images. The above installations can take awhile, so make sure to do this when you're not in a hurry. If you are not sure, then we recommend following these instructions anyway.

Please tell how to do that The terminal says tat ia ma alerady connected to the ftp disconnect from there first This feature is only available to subscribers. Get your subscription here. Log in or Sign up. Suggested articles. No sensible site even enables FTP anymore. It was great to stumble upon this post. This was briliant. Succint, to the point, easy to skim, works. How can I to send a file via ftp using specific port automatically.

I tried of differet way but not work.