Linux

Installing spark requires installing the JDK first and installing Scala.1. Create a Directory> Mkdir/opt/spark> Cd/opt/spark2. Unzip, create a soft connection> Tar zxvf spark-2.3.0-bin-hadoop2.7.tgz> Link-s spark-2.3.0-bin-hadoop2.7 Spark4. Edit/etc/

Linux Root Password retrieval method One 1th step: In the system into a single user state, directly with passwd root to change. 2nd Step: Boot the system with the installation CD, the Linux rescue State, the original/partition hook up, as follows:

If you've been using Linux for a long time, then you know that Linux has changed several strategies in the case of device files. Early in Linux, the device files were just plain files with the appropriate set of attributes, created by the Mknod

Questions:Today when you open your own virtual machine to learn, found in the file system check the following error:/dev/mapper/volgroup-lv_root:unexpected inconsistency; RUN fsck manually. [FAILED]This hint means that the Linux file system is

Ls-l |grep "^-" |wc-l//verified Redhat easy to useOrFind./company-type F | Wc-lView the number of files under a folder, including the subfolders.Ls-lr|grep "^-" |wc-lView the number of folders under a folder, including those in subfolders.Ls-lr|grep

Monitoring IO Disk Performance命令如下：iostat -x 磁盘使用iotop 磁盘使用 %util look at the health of a hard drive, Installing Iotop[[email protected] ~]# yum install -y iotop Iotop command, mainly to see the io> column, see the performance of

FTP的内容File Transfer ProtocolFTP is a file transfer in the Internet Protocol, based on the client/server mode, the default use of Port 20, 21st, where Port 20 (data port) for data transmission, Port 21 (command port) to accept the client issued the

CommandHexdump Viewing binary files-n the number of bytes before the output file is formatted-C Output Specification 16 binary and ASCII codeLSBLK Viewing block devicesFdisk creating an MBR partitionGdisk creating a GPT partitionParted advanced

18.1theLinuxlearning is not difficult. File System Management (1):XFSFile System IntroductionXFS is a high-performance 64-bit log file system developed by Silicon Graphics in 1993 for the IRIX operating system. In May 2000, the source code for the

As we all know, Linux is a free system, which can be translated freely, and can be interpreted as free. So, on the internet, there are a variety of different Linux versions for us to choose from. The various versions have their own pros and cons,

The SCSI interface is widely used in the server because of its wide application, multitasking, high bandwidth, low CPU usage, and hot Plug and unplug.Of course, with the support of the virtualization platform, can also simulate the SCSI device, to

1. The first page to use FTP; VSFTPD must be installed on the serverInstallation commandsYum installed VSFTPDTo See if vsftpd starts [email protected]:/home/daokr# service vsftpd status Vsftpd.service-vsftpd FTP Server loaded:loaded

" view disk or directory capacity df and du"DF View the total capacity of mounted disks, usage capacity, remaining capacity, etc., can not add any parameters, by default is displayed in K unitsDF Common parameters are –i-h-k–m, etc.-I display

Transferred from: http://blog.sina.com.cn/s/blog_6929134b0100tdn8.htmlA spin lock is a bit like a mutex, except that the spin lock does not cause the caller to sleep, and if the spin lock has been held by another execution unit, the caller has been

Linux installation process encountered problems 1, the Linux installation process does not have the Ubuntu (64-bit) option (My Computer is 64-bit)?? Workaround:The reason is that there is no open Blos, each computer has a way to enter the Blos, to

[Translation] maximum logical volume size limit in LVM, lvm Logic   This article is A translation Of Maximum Size Of A Logical Volume In LVM on this blog. Please respect the original and labor achievements Of the translation, and those who reprint

Docker installation mysql database tutorial, dockermysql Database Install MySQL using Docker Search for mysql images on Docker Hub runoob@runoob:/mysql$ docker search mysqlNAME DESCRIPTION

Introduction to File. separator separators (Java ), In windows, the path separator is different from the path Separator in Linux. When the absolute path is used directly, baolu across platforms will expose "no suchffile or directory ", this is often

Putty connects to ubuntu: network error: connection refused, puttyubuntuCause: Ubuntu has a bug: a folder sshd is missing in the/var/run/directory.Solution: On the command line, enter: Sudo mkdir/var/run/sshd Sudo/usr/sbin/sshd Netstat-nltThe

Notes on basic concepts of Kubernetes Kubernetes (K8s) is an open-source system for automatically deploying, scaling, and managing containerized applications. It is an "open-source version" of Google's internal tool Borg ". Kubernetes is currently