I've just changed my OS X / Mac main user - I've created a new 'coder' user account that I want to use for development instead of my old 'lombard' account. I realized that a lot of my applications I've previously installed via Homebrew now had to be…
1. man - an interface to the on-line reference manuals $man man 2. apt - advanced package tool SEE ALSO: apt-cache, apt-get, apt.conf, sources.list $apt-cache search mysql 3.sudo - execute a command as another user (sudo allows a permitted user to ex…
Overview appendToFile cat chgrp chmod chown copyFromLocal copyToLocal count cp du dus expunge get getfacl getmerge ls lsr mkdir moveFromLocal moveToLocal mv put rm rmr setfacl setrep stat tail test text touchz Overview The File System (FS) shell incl…
1.文件系统结构和基本操作 ls - - list directory contents -a/A 列出全部文件(包含隐藏文件) - i 列出inode号码 -n 查看UID and GID -d +目录名 列出目录内的指定目录 ls -R 递归列出目录中所有文件,包括子目录中的文件. ls -S 按文件容量大小排序 ls -t 修改时间排序 chown -- change file owner and group chown root /var/run/httpd.pid 修改http…
简介 HDFS(Hadoop Distributed File System )Hadoop分布式文件系统.是根据google发表的论文翻版的.论文为GFS(Google File System)Google 文件系统(中文,英文). HDFS有很多特点: ① 保存多个副本,且提供容错机制,副本丢失或宕机自动恢复.默认存3份. ② 运行在廉价的机器上. ③ 适合大数据的处理.多大?多小?HDFS默认会将文件分割成block,64M为1个block.然后将block按键值对存储在HDFS上,并将键…
Create a directory in HDFS - mkdir The hadoop mkdir command is for creating directories in the hdfs. This is similar to the unix mkdir command. You can use the -p option for creating parent directories. Takes path uri’s as argument and creates direct…
Go 1.5 Release Notes Introduction to Go 1.5 Changes to the language Map literals The Implementation No more C Compiler and tools Garbage collector Runtime Build Ports Tools Translating Renaming Moving Compiler Assembler Linker Go command Go vet comma…
Files and Directories Introduction In the previous chapter we coveredthe basic functions that perform I/O. The discussion centered on I/O for regular files-opening a file, and reading or writing a file. We'll now look at additionalfeatures of the…
显示了七列信息,从左至右依次为:权限.文件数.归属用户.归属群组.文件大小.创建日期.文件名称 d :第一位表示文件类型 d 文件夹 - 普通文件 l 链接 b 块设备文件 p 管道文件 c 字符设备文件 s 套接口文件 rwx :第2-4位表示这个文件的属主拥有的权限.r是读.w是写.x是执行 r-x :第5-7位表示和这个文件属主所在同一个组的用户所具有的权限 r-x :第8-10位表示其他用户所具有的权限 常用的linux文件权限: 444 r--r--r-- 600 drw-…
4.1 Introduction 4.2 stat, fstat, fstatat, and lstat Functions The lstat function is similar to stat, but when the named file is a symbolic link, lstat returns information about the symbolic link, not the file referenced by the symbolic link. 4.3 文件类…
chown将指定文件的拥有者改为指定的用户或组,用户可以是用户名或者用户ID:组可以是组名或者组ID:文件是以空格分开的要改变权限的文件列表,支持通配符. chown常见命令参数 Usage: chown [OPTION]... [OWNER][:[GROUP]] FILE... or: chown [OPTION]... --reference=RFILE FILE... Change the owner and/or group of each FILE to OWNER and/or GR…
Changing User Ownership To apply appropriate permissions, the first thing to consider is ownership. To do this, there is the chown command. The syntax of this command is not hard to understand: ■ chown who what For instance, the…
