Linux

Linux memory usage details command: free-m (-m means M bytes to display the content) total used free shared buffers cachedMem: 1002 769 232 0 62 421-/+ buffers/cache: 286 715 Swap: 1153 0 1153 www.2cto.com Part 1 Mem row: total memory: 1002 Mused

In Linux, it is necessary to know some basic information before setting the command prompt. 1. Environment Variable: PS1 (number 1). Different Linux versions have different bash values. You can find the following information in man bash.

Sudoers file change error, root permission cannot be used solution/etc/sudoers: syntax error near line sudo: parse error in/etc/sudoers near line 25 sudo: no valid sudoers sources found, quitting ultimate solution: www.2cto.com 1. shift to recovery

Before entering the text interface of ubuntu, I have been using ubuntu to develop TI programs, samba sharing, coding on winXP, and ssh compilation. Later I did not know what programs were updated, there is a process that occupies about 85% of CPU

Three things are required for installing the H3C iNode client in ubuntu 12.04 or later versions: www.2cto.com 1. iNodeClient_For_Linux_V3.60-E6210.tar.gz2. libtiff. so.43. libjpeg. so.62 // the document says only libtiff is missing. so.4, but a

Troubleshooting during linux StartupFault 1: The MBR is damaged www.2cto.com. If a CD is available, www.2cto.com will be directly installed to repair the MBR (Ensure that the hard disk has been installed with the system. first, we need to use the CD

Core and core modules, loading and uninstalling modules 1. Core:/boot/vmlinuz or/boot/vmlinuz-version; RAM Disk required for core decompression: /boot/initrd (/boot/initrd-version); core modules:/lib/modules/version/kernel or/lib/modules/$ (uname-r)/

Git + github use 1. Create a new Repository on github, after the basic information is completed, remember the git@github.com: xxx/xxx. git.2. local configuration username and mail configuration will be in ~ /. Gitconfig www.2cto.com # git config --

When compiling Xen source code, an error [iasl] is reported. When compiling xen source code in CentOS5.4: Execute make xen tools stubdom, the following error is reported: acpi asl compiler (iasl) is needed www.2cto.com Download and install Intel

1. The link for yum on the Internet requires a repodata Directory, which is the place where the software attributes generated after analysis of RPM software depend on each other. 2. configuration file:/etc/yum. repos. d/CentOS-Base.repo, you can

Linux-although I am not an O & M engineer for simulating dos2unix commands, I have encountered some interesting problems due to studying linux and shell scripts, for example, we often upload text files in the window environment to linux. Due to the

For details, the Java program running Too program open files on Linux may encounter "Too program open files" exceptions, which are common in scenarios such as high-concurrency File System Access and multi-thread network connection. Files frequently

How to delete a large number of files in linux: oracle 11 GB database generates a large number of audit log files, more than 2 million, directly rm or use find, then rm cannot succeed, -bash-3.2 $ ls-l/oracle/app/oracle/admin/tyrzdb/adump | wc-l24177

Common linux commands: grep/find grep [option] pattern [filename]-v content that does not contain patttern-c display number of rows containing pattern-number of rows without pattern-I search ignore case-n show number of rows-r search in the

Centos_Error: Protected multilib versions _ solution yum install libc. so.6Loaded plugins: fastestmirror, refresh-repository base is listed more than once in the configurationRepository updates is listed more than once in the configurationRepository

Summary: 1. If the samba server cannot be connected, it is a firewall or SELiunx problem, the firewall can be disable directly from the graphic interface or/etc/rc. d/init. d/iptables stop, SElinux can be done with setenforce 0 under the root user,

In Linux, commands that obtain HELP in Linux can use the-h or -- help parameters to obtain usage methods and parameters. For example, ls can use -- help, cd can be used to obtain help information with-h. "[]" indicates the optional parameter

Linux Extension permission default permission each terminal has an umask attribute to determine the default permission for creating a new file umask indicates that the default permission for the directory is: 777-umask the default permission for the

Mkdir function-linux mkdir function header file library: # include # include function prototype: int mkdir (const char * pathname, mode_t mode); Function Description: The mkdir () function creates a directory named after the pathname parameter in

Linux file decompression tips-x: Decompress file-c: Create a compressed file-z: Decompress the file through gzip or gunzip/ungzip-j: decompress bzip2 format file-v: displays the file information processed in each step-f: Specifies the file name to