check if file empty unix

I. INTRODUCTION Unix system, as a powerful multi-user time-sharing operating system, has been applied in more and more occasions, and the requirements of UNIX system management are more and more, but the current Books on UNIX system management

UNIX awk User Manual (version 2) Chi zhonglong Author's words: The UNIX awk User Manual was my work a few months ago. Looking back, this article is really rough, because I was too busy writing and uploading this work, without a good check on the

The UnixDos text file format has been around for one or two hours. a batch of text files cannot be imported into the database. after being saved with notepad ++, it is OK. Later, we found that these text files are in UNIX format. Check the file

Copy an empty file and ignore its empty contentFirst of all, what is called an empty file! For example, the following code:1#include 2#include string.h>3#include 4#include 5#include 6#include 7#include 8#include 9 Ten #defineMODE o_creat| o_rdwr|

Unix SystemIn, some programs use the systemRootProcess running. These programs do not always have suid permission, because many of them only run by the root, the system administrator needs to know what these programs are doing and what other

First, how to convert files: DOS/Windows and Linux/Unix files have different line breaks and carriage return formats. DOS/Windows-based text files have a CR (carriage return) at the end of each line) and LF (line feed), while UNIX text only has one

This article is used to record common file manipulation functions in Linux programming, including system calls and library functions, for review.One problem with direct use of the underlying system calls for input and output operations is that they

  First, how to convert files: The format of line breaks for DOS/Windows and Linux/Unix files is different. DOS/Windows-based text files have a CR (line breaks) and LF (line breaks) at the end of each line ), UNIX text only has one line feed. 1.

How do I install depot files? First Su to root user, then swinstall –s/home/... Hit the path and file name, enter, a character interface with a menu, you can tab switch, first in the following "box" to enter, select the entry to install (1 of the 1

IPC (inter-process communication, interprocess communication) can have three ways of sharing information (along with the file system, with the kernel, with shared memory). (Of course, although it is interprocess communication, it can also be