![]() It reads a line, operates on it, and outputs the resulting text before repeating the process on the next line. If you examine the output closely, you’ll see that it has the first line twice, followed by the second line twice, etc, which tells you that sed operates on data line by line. Sed automatically prints each line by default, and then you’ve told it to print lines explicitly with the “p” command, so you get each line printed twice. You’ll see each line of the BSD file printed twice:Ĭopyright (c) The Regents of the University of California. Let’s explore sed’s explicit print command, which you specify by using the p character within single quotes. In the previous example, you saw that input passed into sed without any operations would print the results directly to standard output. Notice, this list of conditions and the following disclaimer in theĭocumentation and/or other materials provided with the distribution.Īs you can see, you can operate on files or streams of text, like the ones produced when piping output with the pipe (|) character, just as easily. Redistributions in binary form must reproduce the above copyright Notice, this list of conditions and the following disclaimer.Ģ. Redistributions of source code must retain the above copyright Modification, are permitted provided that the following conditionsġ. Redistribution and use in source and binary forms, with or without OutputCopyright (c) The Regents of the University of California. You’ll see the BSD license displayed to the screen: sed sends its results to the screen by default, which means you can use it as a file reader by passing it no editing commands. Let’s use sed to view the contents of the BSD license file. ![]() OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF.LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY.HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT.OR SERVICES LOSS OF USE, DATA, OR PROFITS OR BUSINESS INTERRUPTION). ![]()
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