oops in c

Method 1:Solution:Enter the following command on the terminal:Setsebool ftpd_disable_trans 1Service vsftpd restartPress enter. The network is too powerful.Method 2:I had the same problem recently, I also got the message:500 OOPS: failed to open xferlog log file:/var/log/xferlogThis is what I did:Open a terminalSwitch to root using su-Service vsftpd stopWait for the message: Shutting down vsftpd: [OK]After this I removed the log fileRm/var/log/vsftpd.

Just solved 530 of the problem, and came to a linux-500 oops:cannot change directory:/root, what is the reason, the Internet to check a bit, the main reason is that the system enabled SELinux settings. When the system is installed, the default selinux is set to mandatory if you have not modified it.Troubleshooting: Check selinux settings, enter system-admin-security level and firewall, and sure enough selinux is set to mandatory. How to solve this problem? Method 1: Set SELinux directly to "disa

Kernel development is sometimes oops, such as a wild pointer that causes the kernel to crash, such as the following log at run time: There are now three ways to find out where the wild pointer appears. 5.438972]bellsbells:wm5102-aif10 are obtained directly through the Addr2line command, for example: $ arm-none-linux-gnueabi-addr2line-e Vmlinux c040faa0 Note: Please make sure that cross_compile with the same prefix you compile, such as the arm-

[Reference: 9 Floor, http://bbs.chinaunix.net/thread-704039-1-1.html] Like other daemon programs, vsftpd provides standalone and inetd (inetd or xinetd) running modes. For a brief explanation, standalone is started at a time and remains in the

kernel that provides a way to check kernel memory and data structures while the system is running. Oops, KDB in the article Master Linux Debugging technology has detailed introduction, we can refer to. Kprobes provides an interface to force access to any kernel routines and to gather information from interrupt handlers without interference. Using Kprobes, you can easily gather debugging information such as processor registers and global data structur

. Generally, program errors can be identified without additional tests. Most errors of OOPS messages are null pointer references orUse other incorrect pointer values. These errors usually lead to an oops message. The addresses used by the processor are all "virtual" addresses, and are called a page table through a complex table (see Chapter 13th "MMAP"And the "page table" section in DMA) is mapped to a phys

Information about the system. Map File seems to be lacking. In fact, it is not mysterious at all, and it is not as important as it looks. However, the lack of necessary documentation makes it mysterious. It is like an earlobe, which we all have, but we don't know what to do. This page is used to illustrate this problem. Note that I am not 100% correct. For example, a system may not support the/proc file system, but most systems certainly do. Here I assume that you are "with the big stream" and

. Here I assume that you are "with the big stream" and have a typical configuration system. Some explanations about Kernel errors (Oops) come from Alessandro Rubini's book "Linux device drivers", where I learned most about Kernel programming.What is a symbol (symbols )? In programming, a symbol is a program creation block: it is a variable name or function name. Just like your own program, it should not be surprising that the kernel has various symbol

Information about the system. Map File seems to be lacking. In fact, it is not mysterious at all, and it is not as important as it looks. However, the lack of necessary documentation makes it mysterious. It is like an earlobe, which we all have, but we don't know what to do. This page is used to illustrate this problem. Note that I am not 100% correct. For example, a system may not support the/proc file system, but most systems certainly do. Here I assume that you are "with the big stream" and h

Original address: http://blog.csdn.net/seatalks/article/details/52981819In this article, let's talk about compressed oops (a compressed normal object pointer). It is one of the optimization techniques of the JVM. Why should we put forward the concept of compressed oops? That's because the 32-bit and 64-bit architectures are different. Next, we will briefly review the 64-bit architectural features, and then

' proc file ' and is ' created on the Fly ' when a kernel-up. Actually, it ' s not really a file; It ' s simply a representation of kernel data which is given the illusion of being a disk file. If you don ' t believe me, try finding the FileSize of/proc/ksyms. Therefore, it would always be correct for the kernel this is currently running. However, System.map is a actual file on your filesystem. When you are compile a new kernel, your old system.map has wrong symbol information. A new System.map

Find and solve program errors in Linux Source: http://www.ddvip.net/ OS /linux/index6/56.htm Steve best (sbest@us.ibm.com)JFS core team member, IBM You can monitor the running user space program in various ways: You can run the debugger for it, debug the program in one step, add print statements, or add tools to analyze the program. This article describes several methods that can be used to debug programs running on Linux. We will review the four debugging problems, including segment errors, me

Source: http://www.ddvip.net/ OS /linux/index6/56.htm Find and solve program errors in Linux Steve Best (sbest@us.ibm.com)JFS core team member, IBM You can monitor the running user space program in various ways: You can run the debugger for it, debug the program in one step, add print statements, or add tools to analyze the program. This article describes several methods that can be used to debug programs running on Linux. We will review the four debugging problems, including segment errors, me

program has gone wrong. In the 3rd case, we use the Oops feature of the Linux kernel to solve the program's segment errors and show you how to set the kernel source level debugger (kernel source levels debugger,kgdb) to use the GNU debugger (GNU Debugger,g db) to solve the same problem; the KGDB program is a remote GDB using a serial connected Linux kernel. In the 4th case, we use the magic keying sequence (magic key sequence) provided on Linux to di

. Reasons for the generation of Linux Kernel panic Panic is a panic in the English language, Linux Kernel panic as its name, Linux Kernel do not know how to go, it will as far as possible it can be obtained at this time to print out all the information. There are two main types of kernel panic, which are explained in more detail in the following two categories of panic: 1.hard panic (i.e. AIEEE information output)2.soft panic (i.e. oops information ou

The main way to identify and resolve program errors on LinuxYou can monitor a running user-space program in a variety of ways: You can run the debugger for it, step through the program, add a print statement, or add tools to parse the program. This article describes several methods that you can use to debug programs that run on Linux. We'll review four debugging problems, including segment errors, memory overflows and leaks, and hangs.This article discusses four ways to debug Linux programs. In

{}finally{Console.log (' finally '); No matter if there is an exception, finally the final clause is executed}try{try{throw new Error (' oops ');}finally{Console.log (' finally ');}}catch (ex) {Console.error (' outer ', ex.message); The result of the execution is finally outer oops, because there is no catch in the internal try, it is necessary to execute the catch that is closest to him, but there is final

configuration file.Oops　　Oops is the most common way that the kernel informs users of unfortunate occurrences. Kernel space error is difficult to repair itself, it can not kill itself. The kernel can only publish Oops. This process involves outputting error messages to the terminal, storing information in the output register, and outputting trace traces that can be traced.There are many possible causes of

Linux is still quite common, So I studied the Linux system and shared it with you here. I hope it will be useful to you. When the Linux system crashes, what people see is not the classic "blue screen" Phenomenon of Microsoft Windows operating system. Instead, it shows that the system crash report signature is called "oops ", this is a surprising exclamation point, which is equivalent to "Oh") to help developers identify the cause of system errors. Som

space is set to 31g, and the relevant tests are as follows: Test 1:-xmx32g-xx:+usecompressedoops settings not in effect -xmx31g-xx:+usecompressedoops settings take effect [Rgf@datanode02 mqpf]$/home/rgf/java/jdk1.8.0_151/bin/java-server-xmx32g-xx:+usecompressedoops-xx:+ Usecompressedclasspointers-xx:+printflagsfinal Oops | grep Oops Java HotSpot (TM) 64-bit Server VM warning:max heap size too large for co