This manual will show you how to output textual content to the terminal window the use of the linux echo command.<\/p>\n
Used on its very own in the terminal the echo command isn’t in particular beneficial but when used as part of the script it may be used to show commands, errors, and notifications.<\/p>\n
In its simplest shape the perfect manner to output textual content to the terminal is as follows:<\/p>\n
Echo \"howdy world\"<\/pre>\nThe above command outputs the words “howdy global” to the screen (minus the citation marks).<\/p>\n
By default, the echo announcement outputs a new line character on the give up of the string.<\/p>\n
To test this out attempt the subsequent statement in a terminal window:<\/p>\n
Echo \"howdy international\" && echo \"good-bye world\"<\/pre>\nYou may see that the result is as follows:<\/p>\n
Hi there international\r\n\r\nGood-bye international<\/pre>\nYou could omit the brand new line man or woman by using adding the minus n switch (-n) as follows:<\/p>\n
Echo -n \"good day international \" && echo -n \"good-bye world\"<\/pre>\nThe result from the above command is as follows:<\/p>\n
Hiya world goodbye international<\/pre>\nSome other issue to consider whilst the use of the echo declaration is the way it handles unique characters.<\/p>\n
As an example strive out the following in a terminal window:<\/p>\n
Echo \"howdy worldrngoodbye world\"<\/pre>\nIn a perfect global the r and n might act as special characters to add a brand new line however they don’t. The end result is as follows:<\/p>\n
Howdy worldrngoodbye global<\/p>\n
You may enable special characters the use of the echo command by using which includes the -e transfer as follows:<\/p>\n
Echo -e \"hiya worldrngoodbye global\"<\/pre>\nThis time the end result will be as follows:<\/p>\n
Hi there international\r\n\r\nGoodbye world<\/pre>\nYou can of route be in the situation wherein you are attempting to output a string that would be dealt with as a unique individual and you do not want it to. On this situation use a capital e as follows:<\/p>\n
Echo -e \"hi there worldrngoodbye international\"<\/pre>\nWhich special characters are handled using the -e transfer?<\/p>\n
Permit’s try a couple of these out. Run the subsequent command in a terminal:<\/p>\n
Echo -e \"helblo world\"<\/pre>\nThe above command would output the following:<\/p>\n
Hello international<\/pre>\nObviously now not genuinely what you will want to output to the display screen however you get the factor that backslash b gets rid of the previous letter.<\/p>\n
Now strive the following in a terminal window:<\/p>\n
Echo -e \"hello\\c international\"<\/pre>\nThis command outputs the whole thing up until the backslash and c. The whole thing else is unnoticed together with the brand new line.<\/p>\n
So what is the distinction between a new line person and a carriage return? The brand new line character actions the cursor down to the next line while the carriage return moves the cursor back to the left aspect.<\/p>\n
For example input the subsequent into your terminal window:<\/p>\n
Echo -e \"hello\\nworld\"<\/pre>\nThe output of the above command places the two phrases on exceptional traces:<\/p>\n
hello\r\n\r\nWorld<\/pre>\nNow strive the subsequent out in a terminal window:<\/p>\n
Echo -e \"hello\\rworld\"<\/pre>\nThe distinction among a new line and carriage return turns into very apparent as the subsequent can be displayed as an output:<\/p>\n
World<\/pre>\nThe word hello turned into displayed, the carriage go back took the cursor to the start of the line and the phrase global become displayed.<\/p>\n
It will become a little more apparent in case you attempt the following:<\/p>\n
Echo -e \"hello\\rhi\"<\/pre>\nThe output from the above is as follows:<\/p>\n
Hillo<\/pre>\nIn reality the use of many people still use the rn notation whilst outputting to a new line. Pretty often, but, you may break out with just a n.\u200b<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Used on its very own in the terminal the echo command isn’t in particular beneficial but when used as part of the script it may be used to show commands<\/p>\n","protected":false},"author":2,"featured_media":30581,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1699],"tags":[84600,84601,84599,84602,84603,84597,84598,84596],"class_list":["post-30580","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","tag-echo-e-in-shell-script","tag-echo-n-in-shell-script","tag-bash-log-command","tag-bash-script-echo-command-line","tag-echo-meaning-in-shell-script","tag-linux-echo-command-output-to-file","tag-linux-echo-to-file","tag-shell-script-output-to-screen"],"_links":{"self":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/30580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/comments?post=30580"}],"version-history":[{"count":0,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/posts\/30580\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media\/30581"}],"wp:attachment":[{"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/media?parent=30580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/categories?post=30580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.wikitechy.com\/technology\/wp-json\/wp\/v2\/tags?post=30580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}