paste—merges same lines of several files or subsequent lines of one file
paste filename1 filename2...
paste –d list filename1 filename2...
paste –s [ –d list ] filename1 filename2...
paste concatenates corresponding lines of the given input files filename1, filename2, and so on. It treats each file as a column or columns of a table and pastes them together horizontally (see cut).
Example A.40.
1 ls | paste - - -
2 paste -s -d"\t\n" testfile1 testfile2
3 paste file1 file2
EXPLANATION
Files are listed in three columns and glued together with a tab. Combines a pair of lines into a single line using a tab and newline as the delimiter (i.e., the first pair of lines are glued with a tab; the next pair are glued by a newline, the next pair by a tab, etc.). The –s switch causes subsequent lines from testfile1 to be pasted first and then subsequent lines from testfile2. A line from file1 is pasted to a line from file2, glued together by a tab so that the file lines appear as two columns.
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