101-500 Exam Dumps - LPIC Level 1 Questions and Answers

The command that will copy the current line into the vi buffer is yy. The yy command is a shorthand for yank yank, which means to yank (copy) the current line. The vi buffer is a temporary storage area where thecopied text is stored until it is pasted somewhere else. The yy command can also be preceded by a number to indicate how many lines to copy. For example, the command 3yy will copy the current line and the next two lines into the buffer.

The other commands are incorrect for the following reasons:

• A. c: This command is a shorthand for change, which means to delete the text specified by the following motion and enter insert mode. For example, the command cw will delete the current word and allow the user to type a new one.
• B. cc: This command is a shorthand for change change, which means to delete the current line and enter insert mode. This command is similar to dd followed by i, but it is faster and more convenient.
• C. 1c: This command is not valid, as it is missing a motion after the change command. The motion specifies what text to delete and replace. For example, the command 1cw will delete one word and enter insert mode.
• E. 1y: This command is also not valid, as it is missing a motion after the yank command. The motion specifies what text to copy into the buffer. For example, the command 1yw will copy one word into the buffer.

References:

• [LPI Exam 101 Detailed Objectives], Topic 103: GNU and Unix Commands, Objective 103.8: Perform basic file editing operations using vi, Weight: 3, Key Knowledge Areas: Navigate a document using vi.
• Vi Cheat Sheet, Topic: Basic vi commands.

The split command in Linux is used to split large files into smaller files. The default action of the split command on an input file is to break the file into new files of 1,000 line pieces each. The names of the new files are PREFIXaa, PREFIXab, PREFIXac, and so on. By default, the PREFIX of the new files is x, but it can be changed with the -a option. For example, the following command will split the file someLogFile.log into new files of 1,000 lines each with the prefix log:

split someLogFile.log -a 3 log

The new files will be named logaaa, logaab, logaac, and so on. To verify the number of lines in each new file, we can use the wc command with the -l option. For example, the following command will show the number of lines in the first and the last new file:

wc -l logaaa logaas

The output will be:

1000 logaaa 170 logaas

This means that the original file had 17,170 lines and was split into 18 new files. 17 of them have 1,000 lines each, and the last one has the remaining 170 lines. References:

• [LPI Exam 101 Detailed Objectives], Topic 103: GNU and Unix Commands, Objective 103.7: Perform basic file management, Weight: 4, Key Knowledge Areas: Use of split and cat to split or join files.
• [Split Command in Linux: 9 Useful Examples], Topic: Split Files