Linux

#include #include#include#includeintMain () {if(Access ("test.c", F_OK))!=-1) {printf ("file test.c exists. \ n"); } Else{printf ("test.c does not exist!\n"); } if(Access ("test.c", R_OK)!=-1) {printf ("test.c has readable permissions \ n"); }

For system administrators or programmers, the grep type tool is probably the most popular when it is necessary to search for a specific text or pattern in a directory of complex configurations or in a large source tree. If grep is one of your

Compiling the source code for the application or LIB in the Linux environment often comes with the following error message:The code is as follows:/usr/bin/ld:cannot find-lxxxThese messages will have different results as you compile different types

Copying and moving filesCP: copy(can have multiple sources, but only one target (directory, cannot make files))A file to a fileMultiple files to a directoryCopy By default, the directory is not copied. Copy–r: Replicate directories for recursive

Percona-toolkit is a set of tools under Linux, and we need to use the pt-query-digest to analyze the MySQL slow log query.1. DownloadHttp://www.percona.com/doc/percona-toolkit/2.1/Download percona-toolkit-2.2.11-1.noarch.rpm2. Pre-installationNeed

Compression decompression files under Linux This is a very common command, we need to pack the files very often to do the transfer or other operations.Sometimes the company's programmers need to download the program that is running the site, need to

Specific explanations and tests of getsockopt and setsockopt under LinuxNAMEnameGetSockOpt, Setsockopt-get and SET options on socketsGets or sets the options for the socketSynopsisFunction prototypes #include /* See NOTES *

Development work, often need to add some new drivers, but sometimes do not want to write makefile, or the driver needs to be compiled into the kernel, then how can we add the driver into the BSP, just follow the original compilation steps to get the

Linux Process signal SIGHUP terminate process terminal line hang up SIGINT terminate process interrupt process Sigquit build core file terminate process and generate core file Sigill build core file non- Sigtrap Set up core file tracking

Description of UseService commands are used to manage system services such as Start (start), Stop (stop), restart (restart), view state (status), and so on. The related commands also include chkconfig, NTSYSV, etc., chkconfig to view, set the

Bash is a Unix shell written for the GNU program. : Bourne-again shell-This is a pun about the Bourne SHell (SH) (Bourne again/born Again). Bourne Shell is an early and important shell, written by Steve Burn around 1978, and released with version 7

First, permanent modification Modify the/etc/sysconfig/network to specify the host name Hostname= then execute the command . hostname Host name this time can write off the system, and then re-login after the line. or modify the/etc/hosts file

After you establish a secure trust relationship between the two users of the two machines, you do not need to enter the user's password when implementing the SCP command.1. On the machine client, the root user executes the Ssh-keygen command to

In Linux, view the txt document. In Linux, view the txt document.When we use the Windows operating system, the most commonly used text format may be txt. However, when we copy the txt text documents on the Windows platform to Linux, all the original

Solution for file read-only mode of USB flash disk in linux I often use a USB flash drive to transmit files in ubuntu. Recently I don't know why, the USB flash drive can be used normally in windows, but the file becomes read-only in linux, unable

Use the systemd Management System On Debian Humans can no longer prevent systemd from occupying Linux systems around the world. The only way to stop it is to manually uninstall it on your own machine. Until now, systemd has created more technical,

Red5 source code compilation in Ubuntu 14.04 Compiling environment: Ubuntu14.04/JDK7 Setting up RHEL5 Streaming Media Server-Red5 Install Red5 in RHEL6.4 Install Red5 0.7 Streaming Media Server in Linux Solution for http error: 404 ERROR in Red5 in

CentOS WEB Server partitioning solution, centosweb Parsing the actual size of a partitionSWAP partition 2 GB (memory is 1 GB, usually 2 times of memory)/1G-2G (minimum 150-250 MB)/Boot 32 M-100 M (boot partition, up to M)/Opt 100 M-1G (Additional

View hardware information in centos 1. The hardware information in centos is comprehensive.Common CentOS commands to view cpuMore/proc/cpuinfo | grep "model name"Grep "model name"/proc/cpuinfo[Root @ localhost/] # grep "CPU"/proc/cpuinfoModel name:

[Hd] Gnome 3.14 trial Gnome 3.14 has been released for some time. For more information about this version, see this article. I made a USB boot disk. During the trial, I found that the system has a Chinese input method, which is very good! In