Linux

A beautiful desktop is definitely not just a patent for Windows and Mac. As long as you are careful, there is no problem with Linux KDE and gnome's silly interface. The following are the 10 most beautiful Linux desktops recommended on Digg, some of

The DVR is configured with a m clock speed of arm11 and M memory, half of which are allocated to the video decoder. The kernel and other processes also occupy a lot of memory, leaving less memory for Qt to run. Later, we transplanted QT browser and

Please indicate the source of the post, Article From: blog.csdn.net/chenzhixin Reference: http://blog.ednchina.com/seam_liu/7181/post.aspx # Include # Include # Include Struct serial_t {Int FD;Char * device;/*/dev/ttys0 ,...*/ Int

Global settings: directly modify/etc/profile (all users take effect) User settings: Modify ~ /. Bashrc ~ /. Bash_profie (the current user takes effect) Use the Env command to display all environment variablesUse the SET command to display all

We know that Linux Nat is a stateful Nat Based on ip_conntrack, and its configuration is similar to the effect of BSD's keep state! If you take a look at the prerouting of Netfilter, you will know that ip_conntrack depends on ip_defrag, that is, all

If you look at the help of iproute2, you will find that there is a NAT action in the route section, where the via Parameter provides the conversion address. I will not mention the specific configuration. I only propose two points. First, the

1. Linux implementation Nat overview and Problems Linux Nat is based on ip_conntrack. The Nat rule set by iptables is only valid for the first packet of a stream. Of course, except for rawnat implemented by xtables-Addons! Even rawnat, it must set

Foreword because the previous online server has replaced the IP address, the following problems are recorded in the log when the offline server crontab pulls the backup log (PS: I am a singer while solving the bug at home, nice): Note: You must

Find Command Format find pathname --options [-exec -print -ok ..] Find Command Parameters Pathname: directory path searched by the find command-print: find command outputs the matching file to the standard output-Exec: Find command to execute the

Preparation: DHCP server TFTP Server FTP Server Kickstart File A client with a pxe rom chip that supports Network startup, that is, a bare metal that requires system installation Linux image files Here, a host provides DHCP, TFTP, and FTP services

[Root @ localhost ~] # Chkconfig -- List displays services that can be automatically started upon startup.[Root @ localhost ~] # Chkconfig -- add *** add auto start upon startup *** Service[Root @ localhost ~] # Chkconfig -- del *** Delete boot auto

The system allows a process to create a new process. A new process is a sub-process. A sub-process can also create a new sub-process to form a process tree structure model. All processes in the Linux system are also in a tree structure. The root is

Reprinted from: http://blog.csdn.net/heanyu/article/details/65525787.2. Know the current time The kernel code can always get a representation of the current time by viewing the value of jifies. often, this value only indicates the time since the

I. Memory Address Classification For programmers, the memory address can be simply understood as a way to access the content of a storage unit. For the 80x86 series microprocessor, we need to distinguish three addresses: (1) Logical Address This

1. Shielding SIGUSR1 signals in the main thread2. creat the two subthreads write and read to cancel the blocking of SIGUSR1 in the write thread. 3. The SIGUSR1 signal sent from other processes will be accepted by the write thread. Sigprocmask is

My colleague asked me today how to control the connect blocking time in the C code in Linux. Application background: in Linux, the C program has two target IP addresses that need to be connected. If blocking is used, the program will block the

How to Set thread priority in Linux We use int pthread_create (pthread_t * thread, const pthread_attr_t * ATTR, void * (* start_routine) (void *), void * Arg );But how to set the thread priority?When discussing this issue, we first need to determine

On the Linux platform, the server of a project uses the open-source log4cxx library, a sub-library of the Apache project. Good features. The compilation and installation processes are recorded below.   The official version of log4cxx is

  In Linux,. So is based on dynamic links in Linux. Its functions and functions are similar to. DLL files in windows.     The introduction of. So is as follows:   I. Introduction Generally, the link to the function library is completed during the

10.5.2 proficient in timer settings The timer set by the function alarm can only be accurate to seconds, while the following functions can theoretically be accurate to the subtle: #include  #include  int getitimer(int which, struct