If you want to write multiple lines to a file, use the Here document (Heredoc) redirection. For example, you can pass the content to the cat command and write it to a file: cat << EOF > file.txt The current working directory is: $PWD You are logged in as $(whoami) EOF CopyTo...
"debug" : true, "experimental" : true } EOF sudo bash -c'cat<< EOF > /etc/docker/daemon.json {"registry-mirrors": ["http://registry.docker-cn.com","http://docker.mirrors.ustc.edu.cn","http://hub-mirror.c.163.com"],"insecure-registries": ["registry.docker-cn.com","docker.mi...
Theteecommand takes theechocommand output, displays it in the terminal, and writes it to the specified file. The command creates the file if it doesn't already exist. Check the file contents withcat: Write to File via heredoc Theheredocfeature allows users to write multiple lines of content...
It permitted us to provide multiple lines of input to a command or program directly from the command line without needing an external file. While using here-document, we do not have to enclose your text within the single or double quotes. 6. Using the read Command with the Here Document ...
Another method we can use to append multiple lines to a file in bash is to use the heredoc. A heredoc is a redirection feature that allows you to pass multiple lines to a command or a file. Using a heredoc involves specifying a delimiter at the beginning of your command. Once the shell...
In larger scripts, you might need to process large amounts of data stored in arrays. For instance, you might have a script that reads lines from a file into an array and then processes each line individually. In such cases, knowing how to loop through arrays in Bash is invaluable. ...
-G, --basic-regexp Interpret PATTERN as a basic regular expression. This is the default.-c, --count Suppress normal output; instead print a count of matching linesforeach inputfile.-e PATTERN, --regexp=PATTERN Use PATTERN as the pattern. If this option is used multiple times or is com...
Now in order to comment out multiple lines, we place ” : ‘” a line before the lines to be commented out and a ”‘” after the end of the lines as shown below: #!/bin/bash : ' echo "THIS COMMAND IS GONNA GET EXECUTED" echo "UNLESS WE COMMENT OUT THE LINES" echo "USE BAS...
touch.It creates a new file. pwd.It displays the present working directory. echo.It prints a string of text or a variable value to the terminal. man.It opens the commands manual. which.It displays the Bash shell path. df.It displays the available disk space. ...
Now add these lines to your ~/.bashrc, ~/.profile, or ~/.zshrc file to have it automatically sourced upon login: (you may have to add to more than one of the above files)export NVM_DIR="$HOME/.nvm" [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm ...