Linux

When CentOS 6.3 deletes the old kernel, CentOS 6.3 often updates the kernel. As a result, many boot items are added during startup. we can delete the old kernel and keep the latest kernel, which can free up some disk space. View installed kernel

The dock taskbar in Apple's mac OS is impressive with the dock tool in ubuntu. The Dock is an important part of Apple's Mac OS X operating system and its ancestor NeXTSTEP and OPENSTEP operating systems. Some early examples of the concept of dock

Linux learning notes 2 permission management command-related links: Linux learning notes a file operation command http://www.bkjia.com/ OS /201211/169196.html 1, chmod command, change the file or directory permissions the first method: www.2cto.com

By default, an administrator account is added to ubuntu only when the account is installed as the system administrator account, and root user permissions are not given. Under the Administrator account, use the passwd command to give the root user a

After suse 11 configures the ssh command to install suse, use yast to install ssh. At this time, putty or xshell cannot be connected. You need to modify the ssh configuration file to allow users to log on to www.2cto.com 1. in

Common Linux commands (7) -- shutdown and restart command 1. Command name: shutdown www.2cto.com execution permission: root Function Description: shutdown Syntax: shutdown directly use shutdown, there will be a buffer period [root @ localhost ~] #

The built-in variable [plain] www.2cto.com awk in the awk language under AIX awk has many built-in variables used to set and modify environment information. The following table lists some commonly used built-in variables and their meanings: ---------

Installation Steps (compiled by yourself):. get the code: (install git first without git: sudo apt-get install git-core) $ git clone git: // github.com/tchaikov/scim-googlepinyin.git $ cd scim-googlepinyin B. prerequisites for compilation: The above

To connect to CentOS in VirtualBox through SSH and connect to CentOS in VirtualBox through SSH, we know that the setting is completely different from that of VMWare, but the setting is simpler in comparison. You can do this in two simple steps: www.2

Methods for ubuntu and windows systems 1. first, we need to have a free space to install ubuntu. the disk processing program in windows is very useful. Right-click the partition to be split and compress the disk, (may fail) www.2cto.com 2. insert

Introduction to cut commands in AIX and use cut to cut columns or fields from standard input or text files. Command Format: cut [options] file1 file2 options: www.2cto.com-c list: specify the number of cut characters-f field: specify the number of

After installing mysql on opensuse, you need to change it to the automatic start mode. As a result, an error is reported when chkconfig -- level 35 mysqld on is used. The usage of chkconfig and chkconfig in Red Hat series on suse is somewhat

1. Create a read/write account Useradd writer # The generated password is an empty account.Passwd writer # set a password for the new userCd/usr/local/samba/bin./Smbpasswd-a writer # authorize the password of the webmaster user Samba

GRUB: On the boot loader menu, type [e] to enter the editing mode.You will face a list of pilot projects. Find the following output sentence lines:Kernel/vmlinuz-2.4.18-0.4 ro root =/dev/hda2 Press the arrow keys until the line is highlighted and

 1. Experiment 1: Signal communication Description: use signal communication to communicate between parent and child processes and brother processes. Solution: Send a SIGCHLD signal to the parent process at the end of the sub-process, the parent

You need to set up password-free login to build a Hadoop environment recently. The so-called password-free login actually refers to login through certificate authentication, use a public/private key authentication method for ssh login.A simple

Vim: text editing toolVi is currently used, relatively powerfulVim has three modesDifferent modes have different functions.Command mode-input mode input I key ConversionInput mode-last line mode input: To last line Use cursor movement in command

  Step 1: Collect information Dmesg checks the startup output information of the kernel to see if there is any information related to the NIC. Ifconfig-a shows all NICs Lspci | grep Ethernet check the NIC Model Lsmod: Check whether the NIC Driver is

  Today, the O & M Department provides a testing environment for virtual machines. They all use public keys for Logon. It is easier to use keys in windows, but the transmission between virtual machines and virtual machines is troublesome. I have to

  Linux timer usage Posted on feisky reading (1073) Comments (0) EDIT favorites The purpose of using a timer is nothing more than to periodically execute a task, or to execute a task at a specified time. To achieve this goal, there are generally two