jackiechen_vip的专栏

Objectives Upon completion of this unit, you should be able to : 1) Expain the nature of open source software 2) Discuss the origins of Linux 3) List the Red Hat operating system distribuions 4)

Objectives Upon completion of this unit, you should be able to: Use the three primary modes of vi and vim Navigate text and enter Insert mode Change, delete, yank and put text Undo chang

Upon completion of this unit, you should be able to: Know how to use local and environment variables Know how to inhibit variable expansion Know how to create aliases Understand how shell

Objectives Upon completion of this unit, you should be able to: Browse the web Exchange emails and instant messages Access a Linux system remotely Transfer files between systems Use n

Objectives Upon completion of this unit, you should be abe to: Describe where Linux stores user, group and password information Change identities Set default permissions Use special perm

Objectives Upon completion of this unit, you should be able to: - Discuss the boot sequece - Understand GRUB’s role - Understand init’s role - Control System V services Boot Sequence Overview B

Objectives Upon completion of this unit, you should be able to: - Understand the importance of time syncronization - Configure system logging - Setup the X Window System - remotely administer the

今天在Ubuntu上修改sudoers文件，保存退出后再运行sudo … 系统报错，大概意思是说sudoers文件第多少行有错误。Sudo命令用不了，也就没有有办法修改sudoers文件了。解决办法是重启机器并进入Recovery Mode，并选择root     Drop to root shell prompt’, 然后在这里修改sudoers文件就OK了。

Objectives Upon completion of this unit, you should be able to: - Understand filesystem hierarchy - Manage virtual memory - Add new drives and partitions - Mount NFS filesystems Overview: Adding

Objectives Upon completion of this unit, you should be able to: - Setup filesystem quotas - Setup and manage software raid devices - Configure logical volumes - Setup LVM snapshots - Perform bac

问题：    CentOS机器上安装了一台HP 1020的USB打印机，CentOS上打印正常，也能正常共享给Windows机器。Windows机器可以连接这台打印机，但打印总是失败。 分析：    登录CentOS机器查看系统日志，发现问题是由于格式不支持而造成的。    Sep  7 16:03:45 CentOS-Host smbd[9066]:   Unable to print

Objectives 1) Upon completion of this unit, you should be able to: - Use tools for extracting, analyzing and manipulating text data Tools for Extracting Text 1) File contents: less and cat 2) Fil

Objectives Upon completion of this unit, you should be able to: 1) Log into a Red Hat Enterprise Linux system 2) Start X from a console 3) Access the command line from X 4) Change your password

Objectives Upon completion of this unit, you should be able to: 1) Know important command line swithes 2) Understand different installation methods 3) Create advanced partition layouts 4) Underst

Linux系统中时间分为系统时间和硬件时间：系统时间是指Linux内核中的时间，硬件时间是指主板上的硬件时钟所计算的时间。不同的时间，设置的方法也不一样。 1）系统时间的设置方法：date 月日时分年 如 11月27日17点50分2008年 [jackie@h2000-0131l ~]$ sudo date 112717502008 Thu Nov 27 17:50:00 CST 200

收藏武功也会贬值 - 好久没用Linux，连这条命令也想不起来了。这里记下来以便查阅。这条命令是用CIFS协议挂载NAS到Linux上。注：要先安装samba-client。 mount.cifs //[NAS IP Address]/[Folder Name] /mnt -o username=xxx,password=xxx,domain=xxx (If uses domain authen

Objectives 1) Upon completion of this unit, you should be able to: - Describe important elements of the filesystem hierarchy - Copy, move and remove files - Create and view files - Manage fil

Objectives 1) Upon completion of this unit, you should be able to: - Use command-line shortcuts - Use command-line expansion - Use history and editing tricks - Use the gnome-terminal Command

Ojectives Upon completion of this unit, you should be able to: Describe how filesystem information is organized Describe the function of dentries and inodes Describe how cp, mv and rm work

1) 在机器启动时按任意键进入启动菜单，选择要进入的内核，然后按e 2) 选中Kernel一行，然后按e 3) 在…rugh quiet一行后添加single，再回车。以表示进入single模式。 4) 回车后退回如下菜单，按b以重启机器。 5) 重启后进入single模式。 6) 输入passwd来修改root密码，再输入reboot命令重启机器。

Objectives Upon completion of this unit, you should be able to: Explore further opportunities in Red Hat Enterprise Linux usage Describe other Red Hat Training offerings Participate in the

Understand system and service initialization Integrate new filesystems Understand advanced partitioning schemes Perform filesystem management tasks Set up networking Perform user and

Q. Ive installed a new 250GB SATA hard disk on our office CentOS Linux server. How do I format a hard disk under Linux operating system from a shell prompt? A.. There are total 4 steps involved for

   简单地说，虚拟内存就是硬盘中的一块区域，它用来存放内存里使用频率不高的页面文件。好处是为了提高内存的利用率 - 让使用频率高的页面文件活动在内存区域中，提高CPU对数据操作的速度。在Linux中，这个区域叫做swap,一般大小应设置为物理内存的2倍。    vm.swappiness是Linux内核的一个参数，范围是0～100。它表示实际内存和虚拟内存区域进行数据交换的倾向性大小，数值越大

Objectives Upon completion of this unit, you should be able to: - configure IP interfaces - setup routes - understand name resolution - setup IPv6 Network Interfaces 1) Networking scr

Objectives Upon completion of this unit, you should be able to: 1) Define virtualization 2) Understand Xen terminology 3) Xen Tools Virtualizaiton with Xen 1) Advantages of Virtualization -

Objectives Upon completion of this unit, you should be able to: 1) Understand system performance security goals 2) Describe security domains 3) Describe system faults 4) Explain system fault anal

Objectives Upon completion of this unit, you should be able to: 1) Describe IP and routing 2) Comapre IPv4 and IPv6 3) Describe IPv6 Features 4) Understand Netfilter Architecture 5) Learn to use

问题 Linux无法支持超过4G的内存，笔者使用的Linux是CentOS 5，机器是DELL PE1950服务器。 原因： X86系统默认寻址能力的限制 解决办法： 安装具有PAE（物理寻址扩展）功能的内核 1) 命令行下运行内核安装命令 yum install kernel-PAE。 2) 编辑启动配置文件 vi /etc/grub.conf，修改defa

注：需显示器，显卡支持。 cat /etc/X11/xorg.conf # Xorg configuration created by system-config-display Section "ServerLayout"     Identifier     "single head configuration"     Screen      0  "Screen0" 0

Objectivies 1) Upon completion of this unit, you should be able to: - Explain the Linux security model - Explain the purpose of user and group accounts - Read and set file permissions Users 1

1) 配置允许访问的用户 [root@RHCE ~]# vi /etc/sysconfig/vncservers # The VNCSERVERS variable is a list of display:user pairs. # # Uncomment the lines below to start a VNC server on display :2 # as

Objectives Upon completion of this unit, you should be able to: Explain what a process is Describe how to manage process Use job control tools What is a Process? 1) A process is a set

Ojectives Upon completion of this unit, you should be able to: Use locate Use find Use the Gnome Search tool locate 1) Queries a pre-built database of paths to files on the system Da

Objectives Upon completion of this unit, you should be able to: Explain the process of installing Red Hat Enterprise Linux Indentify services, their status and be able to manage the runlevels

以前都是习惯使用CentOS的命令行，现在需要使用桌面。在这里做个小小的总结： 1）安装桌面 GNOME桌面 yum groupinstall “X Windows Systems” yum groupinstall “GNOME Desktop Environment” KDE桌面 yum groupinstall “X Windows Systems” yum groupinst

Objectives Upon completion fo this unit, you should be able to: - Configure user and group accounts - Modify file ownership and permissions - Use “Special” permissions SUID/ SGID/ #Sticy - Config

      前几天把vista格了，改用ubuntu9.0.4。ubuntu无论从启动速度还是用户界面上都比较另我满意，再加上强大的开源社区的支持，一点也不比windows系统差。目前为止，唯一不足的是：由于长期以来IE是大多数网民的唯一选择，很多网站目前只支持IE浏览器。为了在ubuntu里能访问这些网站，可以试试以下方法，但并不能100％支持所有的IE only网站。1) 安装fi

Objectives Upon completion of this unit, you should be able to: 1) Develop a strategy for troubleshooting 2) Fix problems in different areas of the Linux system 3) Boot the system into various run

     A person who has completed RH033 will have practiced the basic skills required to be a productive RedHat Enterprise Linux user. The skills include: File and directory operationsStandard I/O and