In the following example, we’ll print the name of the currently logged in user: echo $USER linuxize When using > the file will be overwritten, while the > will append the output to the fileĬommand to view the content of the file: cat /tmp/file.txt The only true wisdom is in knowing you know nothing.Įcho can also display variables. If the file.txt doesn’t exist, the command will create it. echo -e 'The only true wisdom is in knowing you know nothing.\nSocrates' > /tmp/file.txt Instead of displaying the output on the screen, you can redirect it to a file using the >, > operators. echo The PHP files are: *.php The PHP files are: index.php contact.php functions.php For example, the command below will return the names of all the. The echo command can be used with pattern matching characters, such as the wildcard characters. echo -e "You know nothing, Jon Snow.\n\t- Ygritte" You know nothing, Jon Snow. Use the -e option to enable the interpretation of the escape characters. echo "I'm a Linux user." echo $'I\'m a Linux user.' I'm a Linux user.ĭisplay a message containing special characters. To print a single quote, enclose it within double quotes or use the ANSI-C Quoting echo 'Hello "Linuxize"' echo "Hello \"Linuxize\"" Hello "Linuxize"ĭisplay a line of text containing a single quote. To print a double quote, enclose it within single quotes or escape it with the backslash character. echo Hello, World! Hello, World!ĭisplay a line of text containing a double quote.
Flareget import options how to#
The following examples show how to use the echo command:ĭisplay a line of text on standard output. Variables and commands will not be expanded. When using single quotes '' the literal value of each character enclosed within the quotes will be preserved.Although not necessary, it is a good programming practice to enclose the arguments passed to echo in double or single quotes.The shell will substitute all variables, wildcard matching, and special characters before passing the arguments to the echo command.There are a few points to consider when using the echo command. The -E option disables the interpretation of the escape characters.If the -e option is given, the following backslash-escaped characters will be interpreted:.When the -n option is used, the trailing newline is suppressed.
0 kommentar(er)
