shell programming bit

2010-06-02  来源:本站原创  分类:OS  人气:321 

Determine whether a file exists

if [-e filename]

then echo 'file exists'

fi

相关文章
  • shell programming statements used 2010-03-05

    shell base # Find name # Find .. /-name wc * # Find modify file time # Find .. /-mtime -1-type f # Find mtime modify time atime access time ctime create time + is more than -1 +1 Is 1 hour less than the paper is 1 hour # Find. /-Name "[az] *" #

  • the basis of shell programming 2010-04-28

    Author: Leal License: * Creative Commons agreement * GNU Free Documentation License Editors: FireHare, Dbzhang800 We can use either a text editor such as gedit, kedit, emacs, vi, etc. to write shell scripts, it must begin with the following line (mus

  • linux shell programming Summary (Abstract) 2010-05-10

    Seldom written, easy to forget. Extract notes. linux shell programming summary http://blog.csdn.net/ltbook This week learning the unix / linux shell programming, refer to the "LINUX and UNIX Shell Programming Guide", David Tansley forward; Xu Ya

  • Under unix shell programming (1) 2010-06-11

    * Shell What is this? Any invention has for user interface. User interface for UNIX is the Shell (DOS's command are familiar with it, but more powerful UNIX-to). Shell provides the user input commands and command parameters may be the result of the e

  • Linux Shell Programming Training [Reserved] 2010-06-24

    As the project needs, the recent need to write some shell scripts, suffer no basis for a number of documents reproduced in the first study are: On the variables, also need to know a few Linux commands associated. env zone used to display the user env

  • examples of shell programming tutorials 2010-09-10

    Bourne Shell and shell programming copyright information Altmayer.bbs @ altmayer.dhs.org Article Source Yellow-billed Penguin Forum javalee reposted elsewhere rejected the document produced as genuine content of this statement, Dalian University of T

  • linux and unix shell programming guide 2010-10-09

    linux and unix shell programming guide Preface Introduction Part translator directory shell Chapter 1, file security and permissions 1 1.1 Paper 1 1.2 File Type 2 1.3 Permissions 2 1.4 change the permissions bit 4 1.4.1 Symbolic Mode 4 1.4.2 chmod co

  • Shell Programming Introduction 2010-11-08

    Shell is a program with special features, which is between the user and the Linux operating system, an interface between the core. Shell is an important feature is that it itself is an interpreted programming language, shell programming language supp

  • Linux Shell Programming Notes 2010-12-21

    [Notes] --------------------------------------- ------ Shell Programming --------------------------------- [1] variable i = 1 # no spaces on both sides of the equal sign, only one type of all variables - the character channeling echo $ i # reference

  • Transfer: Shell Programming 2011-05-11

    This paper describes how to write a large number of instances of shell scripts. Why the shell programming in Linux systems, although there are a variety of graphical interface tools, but the shell is still a very flexible tool. Shell is not only the

  • Introduction to Linux Shell Programming 2011-01-23

    Shell Programming Abstract: This article describes how to write with a large number of instances a shell script. Why do you want to shell programming in the Linux system, although there are a variety of graphical interface tools, but the shell is sti

  • linux shell programming if statement to determine the parameters within the Detailed 2011-01-23

    shell programming if statement was used to determine the parameters within -B When the file exists and is block returns true if the file -C when the file exists and returns true if the file is a character -D when the pathname is a directory exists an

  • shell programming and UNIX command 1-10 2011-02-24

    Summary of shell programming and UNIX commands, I hope you learn

  • shell programming process control 2011-03-13

    Shell programming process control Source: reproduced (2006-06-16 12:12:54) And other high-level programming languages, Shell provided to control program execution flow of orders, including conditional branching and looping structures, user can use th

  • Small number of shell programming knowledge (shell common sense part) 2011-03-13

    Small number of shell programming knowledge (shell common sense part) Time :2006 -07-16 21:17:50 Source: Author: Reproduced: http://www.xxlinux.com/linux/article/development/shell/2006-07-16/2805.html First, users log into the system after the system

  • shell programming study notes 2011-03-24

    About "#! / Bin / sh" understanding Following the first one for the reference The first study shell programming , See the article said that a shell must be "#!/bin/sh" Beginning, that is the case also had , Although it is known in the

  • shell programming real - Learn By Example 2011-03-26

    shell programming real - Learn By Example 2010-11-16 Tuesday cold Has been used on the command line shell command, but did not write shell scripts, but today happens to the international station pulled all of the code to see local grep revised points

  • Rookie love linux shell programming 2011-04-04

    linxu shell programming really interesting stuff ... ... to play a few times, I really feel with the previous programming in other languages ​​is not the same. I believe there must be more interesting shell programming place! Some put it down on it!

  • Introduction to Linux shell programming [turn] 2011-04-25

    Shell itself is a program written in C language, it is the bridge between users of Linux. Shell is a command language is a programming language. As a command language, which interactively interpretation and implementation of user-entered commands; as

  • Introduction to shell programming under Linux 2011-04-27

    Typically, we enter the command from the command line every time you enter the system can be a response. Once we need to input a command and then a final time before they get results, this approach is clearly not efficient. To achieve this purpose, w