Linux

CronCron is a time-based job scheduler in Unix-like computer operating systems. the name cron comes from the world chronograph (a time-piece ). cron enables users to schedule jobs (commands or shell scripts) to run automatically at a certain time or

Generally, Linux/Unix systems have two different initialization methods. 1) BSD system init2) System V init most of the release kits of Linux use init, which is similar to System V init, namely Sys V init, it is easier and more flexible than the

Git must be installed in the installation NIOS2-LINUX and cannot be installed as per the methods provided by Altera WiKi (enter the command: yum install git-all git-gui make gcc ncurses-devel bison byacc flex gawk gettext ccache zlib-devel

In ubuntu, you can right-click the terminal. The first method is to install a package and add a menu of "open terminal" to the right-click the terminal. Sudo apt-get install nautilus-open-terminal Method 2: Enter the. gnome2/nautilus-scripts

-S: the target file of the ln-s source file. If you want to get the same directory, for example, there is one two directory under/backup/study1 and one two directory under backup/study2. There is also one directory, however, the one directory should

When compiling and installing a new kernel last night, you did not have to delete the Kernel File in/boot. After the kernel is restarted, the system cannot start again. If you reinstall the system, all recent work on the hard disk will be lost.

I used to be a dual-System Windows 7 + Ubuntu 11.10. Later I uninstalled Ubuntu11.10 and re-installed Ubuntu 12.04. As a result, the problem occurred. when the system was started, three options were displayed, one for Windows 7 and two for Ubuntu,

The usage of the ps command in linux indicates that in linux, you can use the ps command to check the running and running statuses of processes, whether the processes are completed, whether the processes are botnets, and which processes are

In Linux, the at command and the t command allow the user to submit a job to the c r o n daemon to run the job at a later time. The later time may be 1 0 m I n or a few days later. If you want to run it after one month or longer, you 'd better use

In Linux, apache mysql and other services cannot be started normally after the default port is modified. Solution: Two webservers are installed on the server, and one is nginx on port 80, with no exception. The other is the port 8001 bound to apache,

There is a folder named "Aptana Studio 3" in the main directory" 1) The cd command can use \ to escape Spaces $ Cd/home/czp/Aptana \ Studio \ 3 2) Assume that there is an executable file in the directory and you can run it by entering the following

KVM clients use host USB devicesSometimes the KVM client still needs to use USB devices, such as USB keys and other KVM command line parameters-usb to open the usb driver and start the usb support-USB device devname to add USB devices to the client,

Redhat allows you to view cpu usage, memory usage, and network usage during system maintenance. You may need to view CPU usage at any time and analyze the system status based on the information. In redhat, you can use the top command to view CPU

Linux ffmpeg installation and Development Configuration 1. ffmpeg installation and installation environment: ubuntu 12.04 (1) Delete installed files to avoid conflict with sudo apt-get remove ffmpeg x264sudo apt-get autoremove (2) install sudo

The shopt command in linux is an alternative to the set command. It is similar to the set command in many aspects, but it adds many options. You can use the "-p" option to view the shopt option settings. "-U" indicates a reset option, and "-s"

Basic Linux operations ----- in Linux, the query 1 which 1 which command is used to find executable program files. The usage is which file name 2. For example, I create a file named tmp in the home directory, then I which tmp, so we cannot find 3,

Fork, source and exec differences in running scriptsWhen the fork method is used to run the script, the shell (parent process) generates a child process to execute the script. When the child process ends, the parent process is returned, however, the

1. Introduction to NTP (Network Time Protocol) is a Network Protocol used to synchronize computer clock. It enables the computer to synchronize time with other servers or clock sources for high-precision time correction. In short, NTP enables time

Fdisk for linux System Disk partitioningThe fdisk command is usually used to learn disk partitions. Of course, for disks smaller than 2 TB, we basically use the fdisk command for partitioning. Below we will briefly introduce the basic commands and

After the network upload and download traffic display is added to the ubuntu indicator location adjustment, as the number size changes, many icons before the indicator keep changing, and it looks quite uncomfortable, the solution for askubuntu is as