如何使用tail、head命令与管道符打印文件中指定行区间的内容？

Great question! Let's walk through exactly how to do this with tail, head, and pipes—no fancy tools needed. Here are two straightforward approaches to print lines 5 through 8 of a .txt file:

Approach 1: Trim from the top first, then grab from the middle #

Use head to get all lines up to your end line (line 8), then pipe that output to tail to start printing from your start line (line 5):

head -n 8 yourfile.txt | tail -n +5

Breakdown: #

• head -n 8 yourfile.txt: Extracts the first 8 lines of the file (since line 8 is our upper bound)
• |: The pipe sends the output of the first command directly into the next one
• tail -n +5: Takes the input from head and prints everything starting from line 5 to the end of that input—leaving us with lines 5-8 exactly.

Approach 2: Skip the early lines first, then trim the end #

Alternatively, start by skipping lines before your start line with tail, then use head to cap it at your end line:

tail -n +5 yourfile.txt | head -n 4

Breakdown: #

• tail -n +5 yourfile.txt: Skips the first 4 lines and prints everything from line 5 onward to the end of the file
• |: Pipes that extended output to head
• head -n 4: Takes the first 4 lines of that input (which are lines 5,6,7,8 of the original file) and stops there—perfect for our target range.

Example Test Case #

If your file example.txt looks like this:

Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10

Running either command above will output:

Line 5
Line 6
Line 7
Line 8

A quick note: Make sure you count the number of lines in your range correctly! For lines X to Y, the number of lines to grab with head in Approach 2 is Y - X + 1 (in this case, 8-5+1=4).

内容的提问来源于stack exchange，提问作者lambozsolty