Linux指定行插入内容的方法总结

[root@*** ~] cat FILE
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 9

sed -i '8iLine\ 8' FILE
[root@*** ~] cat FILE
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9

awk -v n=8 -v s="Line 8" 'NR == n {print s} {print}' FILE > FILE.new

awk 'NR==8{print "Line 8"}1' FILE

{ head -n 7 FILE; echo "Line 8"; tail -n +8 FILE; } > FILE.new

perl -p -e 'print "Line 8\n" if $. == 8' FILE