工作的那些事儿，小梁的blog

摘要： cat:1. to read content of a file: cat /etc/filename2. because cat will send file content to screen, so it can be used to copy file. cat /etc/filepath > newfilepath3. concatenate multiple files into the output: cat file1 file2 file3 > tmpfile44. to number non-blank lines in output, use -b optio 阅读全文