# To show the last 10 lines of file#显示最后10行文件tailfile# To show the last N lines of file#显示最后N行文件tail-n N file# To show the last lines of file starting with the Nth#显示以Nth开头的最后一行文件tail-n +N file# To show the last N bytes of file#显示文件的最后N个字节tail-c N file# To show the last 10 lines of file and to wait for file to grow#显示最后10行文件并等待文件增长tail-ffile