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Bash shell

intro

  • intro

    time // show the time
date // show the date dd/mm/yyyy
echo "" // print something
path // show env vars path
which <program name> // show the path for this program
pwd // print working directory
tail // show the last 10 lines of file
tail -n1 // show the last line of file
tee <file name> // open interactive to write to file line by line

  • cd

        cd < relative path | absolute path > // move to that path
    cd ~ // go home
    cd - // go to previous path

  • clear the terminal

    clear // clear the terminal
Ctrl + l // clear the console.

File Tree

  • ls
    ls --help // ls help
    ls // show all files.
    ls -a // show all files, including hiddens.
    ls -l // show all files with details

  • tree

        tree // show only folder structure
    tree /f // show folders with files

Handle files

  • open files

    cat file.ext // open file in the terminal

  • delete file

        rm <file_name> //  delete a file
    rm -r <directory_name> // delete a directory

  • move, copy, rename files

        mv <path1/file> <path2/file> // move file from path1 to path2
    mv <path/file1> <path/file2> // rename file1 to be file2
    cp <path1> <path2> // copy file from path to path
    cat < file1 > file2 // extract file1 content and store it in file2, copy file1 into file 2

  • edit files 

        echo "something" > file // create file and write something in it.
    symbol ( > file )  // bind the input stream to something, store something in file
    symbol ( < file)  // bind the output stream to something, extract something from file
    cat file // print file content to the terminal
    cat < file // extract the content of file, and handle it as input to cat.
    cat < file1 > file2 // extract file1 content and store it in file2, copy file1 into file 2
    cat < file1 >> file2 // extract file1 content and "append" it in file2, append file 2
    symbol ( | ) // take the output of command to the left, make it input to the right
    ls -l | tail -n1 // show the last line only of the ls command, ls -l output will be input to tail -n1

Curl

  • curl <url> : make get to url
  • curl -v <url> : make get to the url with the request info
  • curl -v -d "<data>" <url> : passing data to your request

References