Linux

Now the digital camera photos of the pixels are very high, most of them will exceed this limit, many times we have to the image of bulk compression, Linux system under How to bulk compress picture size? A powerful free picture tool that can be used

The system must specify an ID value when it establishes an IPC communication, such as Message Queuing, shared memory. Typically, the ID value is obtained through the Ftok function. The Ftok prototype is as follows: key_t Ftok (char * fname, int id)

How to set up Linux time Zone Ls-f/usr/share/zoneinfo/ Ln-sf/usr/share/zoneinfo/posix/asia/shanghai/etc/localtime Date Since the Linux clock and Windows clock are very different from the concept of classification, use to settings, so figuring

1. Function description Pipe (Establish pipeline): 1) header file #include 2) define function: int pipe (int filedes[2]); 3 Function Description: Pipe () creates the pipe and returns the file descriptor from the parameter Filedes array. Filedes[

Recently done cache lab used the getopt function, with man 3 getopt view the following usage, make a summary. Description: The Getopt function is used to parse command-line arguments, with an option element of '-' or '-' that starts with a '-' or '-

1. Function descriptionBaseNamePrints "name" after removing the leading directory path part from the file name path.If you specify a suffix, the trailing "suffix" is also removed.2. Usagebasename path name [suffix]basename options3. Options--HELP

In the Linux/unix system. Each process has a unique process ID that is represented by a nonnegative integer. Though it is the only one. However, the ID of the process can be reused. When a process terminates, its process ID can be used again.Most

Text Processing Three musketeers:grep system: grep, Egrep, Fgrep, Text Search tool, based on "PATTERN" for a given text fuzzy search, grep system is working in greedy mode by default.Sed:stream Editor, Stream editor, line editor, text Editing

./Represents the meaning of this catalogue.(1): User and user Group,1: File owner, file owned by a user2: User group: Assign one or more user rights to the file configuration3: Other people:(2): Linux user identity and user group record files1:root

Linux system can support multiple users to use different terminal equipment login system, users are divided into different groups according to different attributes, in order to system security needs to set different permissions for different users,

Because an Oracle test environment is being built within Vmwarem, the Oracle source installation files are copied from the host. There are many methods, this time want to use 3cdaemon Host (Windows) to do the TFTP server side, Linux as a client

First, Introduction:I have recently inadvertently seen salt with a cron module, here today to introduce the Linux crontab and the management of crontab through the salt cron.Second, the introduction of Linux crontab:The crontab is used to set

The importance of a Linux environment variable conceptOriginally used for Linux to learn the robot operating system (ROS), because have not been exposed to Linux, so do not understand some of the key concepts, resulting in a lot of detours, such as

1: Build a Yum source2: Install Lftp　　Yum Install VsftpNote: Under Linux, see what Software "Rpm-qa" is installed on the system to viewView files within a specific package "RPM-QL + file name"3: Of course, the preparation of these environments is

ArrayVariable: memory storage space;Variable characteristics: Only one data can be stored in each variable, the variable can only be assigned onceAn array of contiguous memory spaces that hold one or more elements, or a collection of multiple

With the introduction of the Linux target for Delphi, a wide range of possibilities is opened up to Delphi developers, to Create Linux server applications. Unfortunately there is currently a limited number of project types available from the RAD

The new Nic device is not hosted in centos6.5, And the NIC is in centos6.5. This is the case. I am a linux cainiao, installed the centos6.5 system on the physical machine, and added a new Nic, however, on the graphic interface, the newly added Nic

Linux basics-network configuration, host name setting, ssh Login, scp transmission, sshscp   1. Network Configuration Modification 1. Temporary modification (ip, dns, netmask, gateway) Temporarily modify the network configuration. If the

Install and configure the vim plug-in ctags and the vim plug-in ctags Recently I used the ctags plug-in. I found that many of the information on the Internet is not clear enough. I have been exploring Multiple blogs. Today, I have finally configured

Linux basic commands and linux basic exercises To enable the Linux operating system, you must log on to the gnome gui as the root user. Select Chinese as the language support. Use the shortcut key to switch to virtual terminal 2, log on as a