Change the maximum number of enable descriptors in Linux

1. Use commands Use in bashUlimit, Only effective for the Current Shell You can alsoAdd the ulimit command line to the bashrc STARTUP script. 2. Use Functions In your ownProgramCallingSetrlimitTo modify 3. modify the configuration file (I

Linux umask command

For example, for the u m a s k value 0 0 2, what is the default creation permission for the corresponding files and directories? Step 1: Write down the mode with all permissions, namely 7 7 7 (all users have read, write, and execute permissions ).

Install the nvdia video card driver of the run file in Linux

To start installation, first modify the/etc/inittab file: ID: 5: initdefault: Changed: ID: 3: initdefault: # Vi/etc/inittab Restart the computer. The system enters character mode and logs on with root, then runs the

Scripts for detecting Apache running status in Linux

In Linux, scripts that check Apache running status regularly check whether Apache is started. If Apache is not started, the service is automatically started. Copy content to clipboard Code : #! /Bin/shCheck_services (){Echo "check services .

Clock Synchronization in Linux

The following example uses the IP address of the clock source server as 192.168.0.1. You can run ntpstat and ntpq-P to view the native ntpd service status. After the configuration is complete, you must restart the ntpd service ntpd restart.

Linux Virtual Machine qume

Http://www.xdowns.com/soft/softdown.asp? Softid = 28509 Software introduction:This package does not require absolute green installation. After decompression, run the Linux. BAT file.Qume is a virtual machine software.DSL. ISO is a Linux livecd

Linux cache memory Parsing

PS: I was asked the day before yesterday, why is there so little memory available in my Linux system? In fact, different from Windows Memory Management, Linux will try to cache memory to improve read/write performance, usually called cache

Obtain the local MAC address in Linux (specify the NIC)

// Obtain the local macstd: String getlocalmac () {# ifndef _ win32int sock_mac; struct ifreq ifr_mac; char mac_addr [30]; sock_mac = socket (af_inet, sock_stream, 0 ); if (sock_mac =-1) {perror ("create socket Falise... mac \ n "); Return" ";}

Compile log4cxx in Linux

It took me one night to compile log4cxx and finally passed it. This bird tool is my whole time.The log4cxx version is 0.97 and the OS is fedora 6. The first problem encountered during the make process is: Quote:

Auxiliary commands for Linux Development (2)

Auxiliary commands for Linux development (1) 1. view the files opened by the Process Lsof 2. View IPv4 and IPv6 listening statuses and corresponding processes Lsof-pnl + M-i4lsof-pnl + M-I6 3. View RPM installation information

Parsing AVI files in Linux (with source code)

Some time ago, because of project requirements, I had to solve the AVI file. At that time, I first wanted to use FFMPEG for processing, but I thought it was too big to run it on the arm. I felt unnecessary. Then, I searched the search engine a

Install the boost library in Linux/Ubuntu

I have never had the habit of writing a blog. Recently I have been studying the development in Linux (but it is only a rough research) and I used the boost library to write something, at least record some of the steps I have taken to install boost,

Linux ln command

Ln command: ln command is used to establish hard links and symbolic links. Hard link: $ Ln file1 file2 $ Cat file1 file2   We can see that file2 is exactly the same as file1. If you delete the file file1, the file file2 still exists. If you delete

View SuSE Linux

1,CAT/proc/version Kernel version # Cat/proc/versionLinux version 2.6.5-7.244-SMP (geeko @ buildhost) (GCC version 3.3.3 (SuSE Linux ))#1 SMP mon Dec 12 18:32:25 UTC 2005   2,Uname- Kernel version # Uname- Linux WebServer 2.6.5-7.244-SMP #1 SMP mon

A simple example of asynchronous IO in Linux

First, paste some struct used in asynchronous Io, because it is rarely used, it is easy to organize and view. Struct aiocb in AIO. h struct aiocb{  int aio_fildes;        /* file desriptor. */  int aio_lio_opcode;        /* operation to be

Compiling the next batch processing file in Linux

(1) in Linux, the batch processing file is basically a shell script file. 1. the simplest way to write a script is to create a new file named "clean" and write Rm-FV * in it *. o; LS-Al; (you can write some common shell commands, which are separated

Dotgnu: Another. Net implementation in Linux

Dotgnu: Another. Net implementation in Linux   While Mono is in full swing, GNU has started its. Net GNU implementation. You can get the latest project progress in http://dotgnu.org and download the latest code.   Portable.net implements the basic.

Change and delete the startup sequence of multiple Linux and Windows systems by modifying grub

  When using Windows, Linux, and other different operating systems, grub boot is used and the default access to Linux is set. however, Windows is usually used, so sometimes you may accidentally enter Linux, which is not convenient. therefore, you

Linux searches for files on a certain day

 Search for files on a certain day Tip Administrator) [Back] [forward 〗 A = 'Find ~ -Print '| LS-l -- full-time $ A 2>/dev/null | grep "Jun 27" | grep 1998Linux commands are amazing!I wrote the following script for you, which is easy to

Introduce the hash_set and hash_map header files in Windows and Linux

Introduce the hash_set and hash_map header files in Windows and Linux Recommended usage:Write the code before the source code: // Just for "# include " in Linux# If _ gnuc __> 2# Include # Include Using namespace _ gnu_cxx;# Else# Include # Include

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