{"id":13582,"date":"2019-04-03T11:09:24","date_gmt":"2019-04-03T11:09:24","guid":{"rendered":"http:\/\/www.appservgrid.com\/paw92\/?p=13582"},"modified":"2019-04-03T11:09:24","modified_gmt":"2019-04-03T11:09:24","slug":"15-practical-examples-of-echo-command-in-linux","status":"publish","type":"post","link":"https:\/\/www.appservgrid.com\/paw92\/index.php\/2019\/04\/03\/15-practical-examples-of-echo-command-in-linux\/","title":{"rendered":"15 Practical Examples of \u2018echo\u2019 command in Linux"},"content":{"rendered":"

echo<\/span><\/span><\/strong>\u00a0is one of the most commonly and widely used built-in command for Linux bash and C shells, that typically used in scripting language and batch files to display a line of text\/string on standard output or a file.<\/p>\n

\n

\"echo<\/a><\/p>\n

echo command examples<\/p>\n<\/div>\n

The syntax for echo is:<\/p>\n

echo [option(s)] [string(s)]\r\n<\/pre>\n
1.<\/strong>\u00a0Input a line of text and display on standard output<\/p>\n
$ echo Tecmint is a community of Linux Nerds \r\n<\/pre>\n
Outputs the following text:<\/p>\n
Tecmint is a community of Linux Nerds \r\n<\/pre>\n
2.<\/strong>\u00a0Declare a variable and echo its value. For example, Declare a variable of\u00a0x<\/strong>\u00a0and assign its value=10<\/strong>.<\/p>\n
$ x=10\r\n<\/pre>\n
echo its value:<\/p>\n
$ echo The value of variable x = $x \r\n\r\nThe value of variable x = 10 \r\n<\/pre>\n
Note<\/strong>: The \u2018-e<\/strong>\u2018 option in Linux acts as interpretation of escaped characters that are backslashed.<\/p>\n
3.<\/strong>\u00a0Using option \u2018\\b<\/strong>\u2018 \u2013 backspace with backslash interpretor \u2018-e<\/strong>\u2018 which removes all the spaces in between.<\/p>\n
$ echo -e \"Tecmint \\bis \\ba \\bcommunity \\bof \\bLinux \\bNerds\" \r\n\r\nTecmintisacommunityofLinuxNerds \r\n<\/pre>\n
4.<\/strong>\u00a0Using option \u2018\\n<\/strong>\u2018 \u2013 New line with backspace interpretor \u2018-e<\/strong>\u2018 treats new line from where it is used.<\/p>\n
$ echo -e \"Tecmint \\nis \\na \\ncommunity \\nof \\nLinux \\nNerds\" \r\n\r\nTecmint \r\nis \r\na \r\ncommunity \r\nof \r\nLinux \r\nNerds \r\n<\/pre>\n
5.<\/strong>\u00a0Using option \u2018\\t<\/strong>\u2018 \u2013 horizontal tab with backspace interpretor \u2018-e<\/strong>\u2018 to have horizontal tab spaces.<\/p>\n
$ echo -e \"Tecmint \\tis \\ta \\tcommunity \\tof \\tLinux \\tNerds\" \r\n\r\nTecmint \tis \ta \tcommunity \tof \tLinux \tNerds \r\n<\/pre>\n
6.<\/strong>\u00a0How about using option new Line \u2018\\n<\/strong>\u2018 and horizontal tab \u2018\\t<\/strong>\u2018 simultaneously.<\/p>\n
$ echo -e \"\\n\\tTecmint \\n\\tis \\n\\ta \\n\\tcommunity \\n\\tof \\n\\tLinux \\n\\tNerds\" \r\n\r\n\tTecmint \r\n\tis \r\n\ta \r\n\tcommunity \r\n\tof \r\n\tLinux \r\n\tNerds \r\n<\/pre>\n
7.<\/strong>\u00a0Using option \u2018\\v<\/strong>\u2018 \u2013 vertical tab with backspace interpretor \u2018-e<\/strong>\u2018 to have vertical tab spaces.<\/p>\n
$ echo -e \"\\vTecmint \\vis \\va \\vcommunity \\vof \\vLinux \\vNerds\" \r\n\r\nTecmint \r\n        is \r\n           a \r\n             community \r\n                       of \r\n                          Linux \r\n                                Nerds \r\n\r\n<\/pre>\n
8.<\/strong>\u00a0How about using option new Line \u2018\\n<\/strong>\u2018 and vertical tab \u2018\\v<\/strong>\u2018 simultaneously.<\/p>\n
$ echo -e \"\\n\\vTecmint \\n\\vis \\n\\va \\n\\vcommunity \\n\\vof \\n\\vLinux \\n\\vNerds\" \r\n\r\n\r\nTecmint \r\n\r\nis \r\n\r\na \r\n\r\ncommunity \r\n\r\nof \r\n\r\nLinux \r\n\r\nNerds \r\n<\/pre>\n
Note<\/strong>: We can double the vertical tab, horizontal tab and new line spacing using the option two times or as many times as required.<\/p>\n
9.<\/strong>\u00a0Using option \u2018\\r<\/strong>\u2018 \u2013 carriage return with backspace interpretor \u2018-e<\/strong>\u2018 to have specified carriage return in output.<\/p>\n
$ echo -e \"Tecmint \\ris a community of Linux Nerds\" \r\n\r\nis a community of Linux Nerds \r\n<\/pre>\n
10.<\/strong>\u00a0Using option \u2018\\c<\/strong>\u2018 \u2013 suppress trailing new line with backspace interpretor \u2018-e<\/strong>\u2018 to continue without emitting new line.<\/p>\n
$ echo -e \"Tecmint is a community \\cof Linux Nerds\" \r\n\r\nTecmint is a community avi@tecmint:~$ \r\n<\/pre>\n
11.<\/strong>\u00a0Omit echoing trailing new line using option \u2018-n<\/strong>\u2018.<\/p>\n
$ echo -n \"Tecmint is a community of Linux Nerds\" \r\nTecmint is a community of Linux Nerdsavi@tecmint:~\/Documents$ \r\n<\/pre>\n
12.<\/strong>\u00a0Using option \u2018\\a<\/strong>\u2018 \u2013 alert return with backspace interpretor \u2018-e<\/strong>\u2018 to have sound alert.<\/p>\n
$ echo -e \"Tecmint is a community of \\aLinux Nerds\" \r\nTecmint is a community of Linux Nerds\r\n<\/pre>\n
Note<\/strong>: Make sure to check Volume key, before firing.<\/p>\n
13.<\/strong>\u00a0Print all the files\/folder using echo command (ls command alternative).<\/p>\n
$ echo * \r\n\r\n103.odt 103.pdf 104.odt 104.pdf 105.odt 105.pdf 106.odt 106.pdf 107.odt 107.pdf 108a.odt 108.odt 108.pdf 109.odt 109.pdf 110b.odt 110.odt 110.pdf 111.odt 111.pdf 112.odt 112.pdf 113.odt linux-headers-3.16.0-customkernel_1_amd64.deb linux-image-3.16.0-customkernel_1_amd64.deb network.jpeg \r\n<\/pre>\n
14.<\/strong>\u00a0Print files of a specific kind. For example, let\u2019s assume you want to print all \u2018.jpeg<\/strong>\u2018 files, use the following command.<\/p>\n
$ echo *.jpeg \r\n\r\nnetwork.jpeg \r\n<\/pre>\n
15.<\/strong>\u00a0The echo can be used with redirect operator to output to a file and not standard output.<\/p>\n
$ echo \"Test Page\" > testpage \r\n\r\n## Check Content\r\navi@tecmint:~$ cat testpage \r\nTest Page \r\n<\/pre>\n
echo Options<\/h5>\n\n\n\n\n\n\n\n\n\n\n\n
\u00a0Options<\/b><\/td>\n\u00a0Description<\/b><\/td>\n<\/tr>\n
\u00a0-n<\/b><\/td>\n\u00a0do not print the trailing newline.<\/td>\n<\/tr>\n
\u00a0-e<\/b><\/td>\n\u00a0enable interpretation of backslash escapes.<\/td>\n<\/tr>\n
\u00a0\\b<\/b><\/td>\n\u00a0backspace<\/td>\n<\/tr>\n
\u00a0\\\\<\/b><\/td>\n\u00a0backslash<\/td>\n<\/tr>\n
\u00a0\\n<\/b><\/td>\n\u00a0new line<\/td>\n<\/tr>\n
\u00a0\\r<\/b><\/td>\n\u00a0carriage return<\/td>\n<\/tr>\n
\u00a0\\t<\/b><\/td>\n\u00a0horizontal tab<\/td>\n<\/tr>\n
\u00a0\\v<\/b><\/td>\n\u00a0vertical tab<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
That\u2019s all for now and don\u2019t forget to provide us with your valuable feedback in the comments below.<\/p>\n
Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
echo\u00a0is one of the most commonly and widely used built-in command for Linux bash and C shells, that typically used in scripting language and batch files to display a line of text\/string on standard output or a file. echo command examples The syntax for echo is: echo [option(s)] [string(s)] 1.\u00a0Input a line of text and … <\/p>\n
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