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--- bash:cut:cut_using_bytes [2020/07/15 09:30] – external edit 127.0.0.1
+++ bash:cut:cut_using_bytes [2021/01/26 16:05] (current) – removed peter
@@ Line 1: / Line 1: @@
-====== BASH - cut - Cut using Bytes ======
-===== Byte Cuts =====
-The **b** option provided by the **cut** utility allows us to cut sections of a text-based on their byte positions.
-Use the cut command with the flag -b followed by the byte numbers for this purpose.
-----
-===== Cut a Single Byte from the Input Stream =====
-<code bash>
-echo "cutting text from input" | cut -b 1
-</code>
-The above command echoes the string “cutting text from input” to the standard output and pipes it as an input to the cut command.
-The cut command will cut just the first byte(c) from this string as only 1 was provided with the -b flag.
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-===== Cut Specific Bytes from the Input Stream =====
-<code bash>
-echo "cutting text from input" | cut -b 1,3
-</code>
-This command will only cut the first and third byte of the string “cutting text from input” and will display “ct” as its output.
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-===== Cut a Range of Bytes from the Input Stream =====
-<code bash>
-echo "cutting text from input" | cut -b 1-12
-</code>
-The above command will cut the byte range 1-12 from the given string and print out “cutting text” on the standard output.
-<WRAP important>
-**WARNING:** Providing byte ranges that are outside of the string’s occupation will result in a message showing “cut: invalid byte or character range”.
-</WRAP>
-----
-===== Cut a Single Byte from the Text file =====
-<code bash>
-cut -b 1 test.txt
-</code>
-This command will display only the first bytes of each of the five rows inside the file test.txt.
-It is equivalent to the command <code bash>cat test.txt | cut -b 1</code>
------
-===== Cut Specific Bytes from a Text File =====
-<code bash>
-cut -b 1,3 test.txt
-</code>
-The above command cuts only the first and third bytes of each row.
-You can specify any byte numbers as long as they fall within the range of bytes available.
-----
-===== Cut a Range of Bytes from a Text File =====
-<code bash>
-cut -b 1-12 test.txt
-</code>
-This command will output the first one to twelfth bytes of each row in the test.txt file.
-----
-===== Cut from a specific Byte to the End of the Input Stream =====
-<code bash>
-echo "cutting text from input" | cut -b 5-
-</code>
-The above cut command will cut the text from the fifth byte to the end of the string.
-----
-===== Cut from a specific Byte to the End of a File =====
-<code bash>
-cut -b 5- test.txt
-</code>
-This command will start cutting every one of the rows of the file test.txt from the fifth-byte position and finish only after each row ends.
-The trailing hyphen (-) is mandatory for this operation.
-----
-===== Cut a Specified Amount of Bytes from the beginning of a string =====
-<code bash>
-echo "cutting text from input" | cut -b -5
-</code>
-This command will cut the first five bytes of the input string.
-Remember to add the preceding hyphen(-) else the output will not be as expected.
-----
-===== Cut from the First Byte to a Specified Position from a File =====
-<code bash>
-cut -b -5 test.txt
-</code>
-The above command will cut just the first five bytes of each line from the file.
-----
-===== Cut Bytes in Alphabetical Order =====
-<code bash>
-cut -b 1-7 test.txt | sort
-</code>
-The output of the cut command is passed to the sort command for displaying the first seven bytes of each row alphabetically.
-For alphabetical sorting, the sort command doesn’t require any options.
-----
-===== Cut Bytes in Reverse Order =====
-<code bash>
-cut -b 1-7 test.txt | sort -r
-</code>
-This cut command will cut the first 7 bytes from each row and will output them in the reverse order.
-Look how the output of the cut command is being fed to the sort command using a pipe.
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