Show certain lines by line number
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Show certain lines by line number of string file
Prepare the testing text file[edit]
echo "line 1" > test.txt echo "line 2" >> test.txt echo "line 3" >> test.txt echo "line 4" >> test.txt echo "line 5" >> test.txt echo "line 6" >> test.txt
key-in the command cat test.txt to view the file content
line 1 line 2 line 3 line 4 line 5 line 6
Approaches[edit]
Approach 1: Using cat, head & tail commands[edit]
1. key-in the command[1]
# X: start line number # Y: end line number X=2 Y=4 Z=$(($Y-$X+1)) cat test.txt | head -n $Y | tail -n $Z
result
line 2 line 3 line 4
2. key-in the command if you want to show the line number of each line
# X: start line number # Y: end line number X=2 Y=4 Z=$(($Y-$X+1)) cat -n test.txt | head -n $Y | tail -n $Z
result
2 line 2 3 line 3 4 line 4
Approach 2: Using sed command[edit]
key-in the command[2]
# X: start line number # Y: end line number X=2 Y=4 Z=$(($Y-$X+1)) sed -n -e "$X,$Y p" -e "$Y q" test.txt
result
line 2 line 3 line 4