A summary of the management of Linux system in the notes of Brother Yun-Wan (I.)

Question One,

Create a new user Xuetong, with the user login error is as follows:

[Email protected] ~]# Su-xuetong

Id:cannot find name for user ID 504

Id:cannot find name for group ID 504

Id:cannot find name for user ID 504

[I have no [email protected] ~]$

And show I have no name!

Resolution: Due to the/etc/passwd and/etc/group two file permissions (600) is not caused by the

Change the permissions of the passwd and group files to 644.

chmod 644/etc/passwd

chmod 644/etc/group

Question Two,

Install KVM virtual machine under linux command line

#virt-install--name mem1--HVM--ram 2048--vcpus 2--disk path=/opt/vms/os_11.img,size=10--network network:default--ac Celerate--vnc--vncport=5911--vnclisten=0.0.0.0--os-variant rhel6--cdrom/root/centos-6.3-x86_64-minimal-efi.iso- D

Error: QEMU-KVM:-drive file=/root/centos-6.3-x86_64-minimal-efi.iso,if=none,media=cdrom,id=drive-ide0-1-0,readonly= On,format=raw:could not open disk image/root/centos-6.3-x86_64-minimal-efi.iso:permission denied

Resolution: Resolution: VIM/ETC/LIBVIRT/QEMU.CONF

# Some Examples of valid values are:

#

# user = "Qemu" # A user named "Qemu"

# user = "+0" # Super User (Uid=0)

# user = "+" # a user named "or a user with uid=100

user = "Root" (remove user before #)

# The group for QEMU processes run by the system instance. It can be

# specified in a similar-to user.

Group = "Root" (remove group before #)

# Whether Libvirt should dynamically change file ownership

# to match the configured User/group above. Defaults to 1.

# Set to 0 to disable file ownership changes.

dynamic_ownership = 0 (remove before dynamic_ownership #)

Problem three, installing a KVM virtual machine from a Xshell remote connection to a Linux host

Error: Cannot open display:

Run ' Virt-viewer--help ' to see a full list of the available command line options

Fri, Sep 18:24:50 DEBUG Domain after install:1

Domain installation still in progress. Can reconnect to

The console to complete the installation process.

Resolution: Connect a Linux host via VNC, IP address +vnc port number (virtual machine-enabled VNC port number), log on to the virtual machine to install the Linux operating system.

Issue four, install Apache

Error: Configure:error:Cannot use a external APR with the bundled Apr-util

Error: Checking for APR ... configure:error:the--with-apr parameter is incorrect. It must specify an install prefix, a build directory, or an apr-config file.

Resolution: Requires the installation of APR and Apr-util

Install Apr

# CD SRCLIB/APR

#./configure--PREFIX=/USR/LOCAL/APR

Error: Onfigure:error:in '/USR/LOCAL/HTTPD-2.2.27/SRCLIB/APR ':

Configure:error:no acceptable C compiler found in $PATH

See ' Config.log ' for more details

FIX: Install GCC dependency package yum-y install GCC

Make && make install, error:

-bash:make:command not found

FIX: Install make package yum-y install make

Installing Apr-util

# CD: /apr-util/

#./configure--prefix=/usr/local/apr-util--WITH-APR=/USR/LOCAL/APR

# make

# make Install

Installing Apache

./configure--prefix=/usr/local/apache--enable-deflate--enable-headers--enable-mime-magic--enable-proxy-- Enable-ssl=static--enable-so--enable-rewrite--with-apr=/usr/local/apr--with-apr-util=/usr/local/apr-util-- With-mpm=prefork--with-ssl=/usr/local/ssl/include--enable-mods-shared=all

Error:

Checking whether to enable Mod_deflate ... configure:error:mod_deflate have been requested but can not is built due to pre Requisite failures

FIX: Install Zlib-devel

Yum Install Zlib-devel

Error: No SSL-C headers found

Configure:error: ... No recognized SSL/TLS toolkit detected

FIX: Install openssl-devel yum installed Openssl-devel

Start Apache/usr/local/apache/bin/apachectl Start

Error: Httpd:could not reliably determine the server ' s fully qualified domain name, using Localhost.localdomain for Servernam E

FIX: Change host names in ServerName and/etc/hosts files in/usr/local/apache/bin/http.conf

Install Apr

# CD SRCLIB/APR

#./configure--PREFIX=/USR/LOCAL/APR

# make

# make Install

Installing Apr-util

# CD: /apr-util/

#./configure--prefix=/usr/local/apr-util--WITH-APR=/USR/LOCAL/APR

# make

# make Install

# CD: /.. /

To load a global variable:

echo "Export ld_library_path= $LD _library_path:/usr/local/apr/lib" >>/etc/profile

Source/etc/profile

Installing Apache

#cd httpd-2.2.21

Yum Install Zlib-devel

./configure--prefix=/usr/local/apache--enable-deflate--enable-headers--enable-mime-magic--enable-proxy-- Enable-ssl=static--enable-so--enable-rewrite--with-apr=/usr/local/apr--with-apr-util=/usr/local/apr-util-- With-mpm=prefork--with-ssl=/usr/local/ssl/include--enable-mods-shared=all

#make && make Install

#netstat-an | GREP:80//See if the linux80 port is turned on

Question Five

Install Hudson Error: Open http://192.168.1.81:8081/hudson/error Error

WORKAROUND: The Java version and the Hudson version must be guaranteed to match. If the Java version is low, an error will be provided.

#ServerName Www.example.com:@@[email protected]@

Listen @@[email protected]@

Question Six

Install Java error:

[Email protected] java]# java-version

Java Version "1.5.0"

Gij (GNU libgcj) version 4.4.7 20120313 (Red Hat 4.4.7-4)

Copyright (C) Free Software Foundation, Inc.

This was free software;  See the source for copying conditions. There is NO

Warranty Not even to merchantability or FITNESS for A particular PURPOSE.

Solve:

[Email protected] bin]# rm-f java

[Email protected] usr]# ln-s/usr/java/jdk1.6.0_26/bin/java/usr/bin/java

[Email protected] usr]# java-version

Error occurred during initialization of VMS

Java/lang/noclassdeffounderror:java/lang/object

Workaround:

Entry directory:/usr/java/jdk/lib

Unzip the Tools.pack to Tools.jar:

unpack200 Tools.pack Tools.jar

Entry directory:/usr/java/jdk/jre/lib

Unzip the Rt.pack to Rt.jar:

unpack200 Rt.pack Rt.jar

Question Seven

Yum Error When:

[Email protected] local]# yum-y install wget

Loaded Plugins:fastestmirror, Presto

Could not retrieve mirrorlist Http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os error was

14:pycurl ERROR 6-"couldn ' t resolve Host ' mirrorlist.centos.org '"

Error:cannot Retrieve repository metadata (Repomd.xml) for repository:base. Verify its path and try again

Error:cannot find a valid baseurl for repo:base error

The workaround is as follows (modify DNS configuration)

Vi/etc/resolv.conf

Last added nameserver 8.8.8.8 in this file

If no VI editor is available

echo "NameServer 8.8.8.8" >>/etc/resolv.conf

Change host Name:

Vi/etc/sysconfig/network modifying hostname

Hostname=vm85.bc.com

Vi/etc/hosts

127.0.0.1 vm85.bc.com

Reboot (must restart the computer)

This article from "Tong Brother's operation and maintenance notes" blog, declined reproduced!

A summary of the management of Linux system in the notes of Brother Yun-Wan (I.)