Linux

1 installing spark-dependent Scala 1.2 Configure environment variables for Scala 1.3 validation Scala 2 Download and decompression spark 3 Spark-related configuration 3.1 Configuring environment variables 3.2 Configure the files in the Conf

20 commands that are very useful to intermediate Linux users Source: Tecmit Translation: Oschina Perhaps you've found the first article very useful, and this article is an extension of the 20 commands that are very useful for primary Linux users.

The free command displays the idle, used physical memory and swap memory in the Linux system, and the buffer used by the kernel. In the Linux system Monitoring tool, the free command is one of the most frequently used commands. 1. Command

7.2. Learn the current time The kernel code can always get a representation of the current time by viewing the value of the jifies. Often, this value represents only the time since the last boot, and this fact is irrelevant to the driver because its

Any operating system written in a high-level language, the kernel source code is always a small part of the code is written in assembly language. Readers who read the Unix Sys v source know that there are about 2000 lines of code written in assembly

1. Df-lh 2. Du-s/usr/* | Sort-rn This is sorted by byte 3. du-sh/usr/* | Sort-rn This is sorted by megabytes (M) 4. Select 10 of the preceding Du-s/usr/* | Sort-rn | Head 5. Select the following 10 Du-s/usr/* | Sort-rn | Tail

    in the Linux distribution, there is a/proc/directory, some also called it the proc file system. In this directory, there are special files that can be used not only to reflect the current state of the kernel and to view hardware information, but

For Example: 1. Create a connection to a file [Root@a ~]# ln-s/home/kk/ss.sh ~ #如果不写目标地址, that is, in the current directory built link [Root@a ~]# ls Centos-base.repo.oldboy anaconda-ks.cfg install.log install.log.syslog ss.sh This command indicates

recommended: More Linux file Lookup and comparison commands attention: Linux commands DaquanThe strings command looks for printable strings in an object file or in a binary file. A string is any sequence of 4 or more printable characters, ending

Time synchronization is important when the Linux service needs time-stamping. Here is a synchronization command that I used recently. # ntpdate s1a.time.edu.cn Commonly used NTP addresses in China 210.72.145.44 (National Timing

Note:Nginx version must be greater than or equal to 1.9,linux I am using version 7.0, remember to turn off the firewallStart text:Here only to mention the two more error-prone configuration, Consul,upsync,pcre Library, SSL library, zlib library

Global ]strict init false1024x768= 2MB lock file= /tmp/zlog. Lock "%d.%us [%v][%f:%l]%m%n"[rules]asr_level. * "/home/test/asr.log"; normalNOTE: If you configure the Rotate lock file entry, in your own native test, be careful to

File default PermissionsFrom the Linux user group, file permissions detailed understanding of the file and directory of the basic Rights Management, when the file is created if you do not specify the specific permissions, then the system will assign

The following error occurs when you run make menuconfig to compile the Linux kernel: Root @ Ubuntu:/mnt/HGFS/linuxshare/linux-3.10.5 # Make menuconfig Hostcc scripts/basic/fixdepHostcc scripts/kconfig/CONF. o***Unable to find the ncurses

1. Brief Introduction Every time windows is used to exit the system abnormally, Scandisk will be swept away. Linux is no exception, but it calls fsck.ProgramTo check the file system. As a system administrator, what do you do when you find that the

Now that Cisco Nat is flexible, Can Linux implement it? The answer is yes! Linux netfilter is super flexible, and Linux Nat is not flexible because the iptables program is not flexible. xtables-Addons rawnat has taken an important step towards

In the development of ARM-based embedded systems, there are usually two types of GCC tool chains that use cross-Compilation: Arm-Linux-* andArm-elf-*, the main difference between the two lies in the use of different C library files. Arm-Linux-* uses

Sina Weibo @ song Baohua Barry at @ micro disk share Prentice. Hall Press "essential. Linux. device. Drivers" Chinese version of the high definition electronic version "Baohua _essence linuxlinuxequipment driver development"

Official homepage: http://www.clamav.net/The latest version is 0.88. You must use the latest version to upgrade the virus database.   System Requirements: refer to the original official document below Quote:RequirementsThe following elements are

1. Why CGI? As we have seen above, any HTML is a static webpage, and it cannot implement some complex functions, while CGI can be implemented for us. For example,. list files in a directory on the server and operate on the files in the directory. B.