Display certain lines in the file in ubuntu

In ubuntu, a few lines of the file are displayed. 1. the cat command is as follows: the command lines 200th to 240 in file_name are available in two ways: [plain] catfile_name | head-n240 | tail-n40catfile_name | tail-n + 200 | head-n4... in ubuntu, a few lines of the file are displayed. 1. the cat command is as follows: the command lines 200th to 240 in file_name are available in two ways: [plain] cat file_name | head-n 240 | tail-n 40 cat file_name | tail-n + 200 | head-n 40 Note: 1) head-n 240 indicates 0 to 240 rows; 2) tail-n 40 indicates that 40 rows at the end are displayed; 3) tail-n + 200: displays the content from row 200 to the end. 2. sed command [plain] sed-n'5, 10p 'file_name so that only 5th rows to 10th rows can be displayed.