Linux

  The newly added hadoop user in Ubuntu cannot execute the command through sudo. The prompt is:   Hadoop is not in the sudoers file...     To solve this problem, you only need to switch to another user who can execute sudo and modify

A) Role: mainly provides download of the main image files of the target machine, file transfer protocol   B) Host Machine: A computer that compiles and links embedded software.   C) target machine: A hardware platform that runs embedded

  Use of top monitoring commands on FreeBSD The top monitoring tool displays the processes whose CPU usage is the first few, and provides real-time CPU activity.   Syntax: top [-s time] [-d count] [-q] [-h] [-n number] [-f filename] [-o field] [-U

  Tomcat/bin/Add the following to the startup. bat file:     SET JAVA_HOME = JDK directory SET CATALINA_HOME = Tomcat directory after decompression   SET JAVA_HOME = E: \ hi-studio \ jdk1.5 SET CATALINA_HOME = D: \ Program Files \ Apache

  Step 2 Edit/etc/inetd. conf   # Telnet stream tcp nowait root/usr/libexec/telnetd # Telnet stream tcp6 nowait root/usr/libexec/telnetd Remove the previous #   Step 2   Cancel security control of Logon account   Telnet is not safe. By default, the

  Environment: ubuntu 11.04 Tools: make, gcc, and make-kpkg Kernel source: linux-2.6.38.8 Steps: 1. Download the internal source code package to the official website (my next is linux-2.6.38.8.tar.bz2) 2. Open the terminal and raise the permission

  1. Install vsftp Here, we set up virtual users. The so-called virtual users do not use real accounts, but only map accounts and Set permissions by some means.   Yum install vsftpd Touch/var/log/vsftpd. log # create a vsftp log File   In CentOS,

  1. Download memcached and libevent respectively and put them in the/tmp directory: # Cd/tmp # Sudo wget http://www.danga.com/memcached/dist/memcached-1.2.0.tar.gz # Sudo wget http://www.monkey.org /~ Provos/libevent-1.2.tar.gz 2. Install libevent

Sometimes, when apache has the write permission, vsftpd cannot be uploaded. In turn, vsftpd can be uploaded, but apache has no write permission. Now let's take a look at how to solve this problem. The solution is to add the ftp user to the apache

A does not need to restart Linux:[Root @ localhost ~] # Setenforce 0B. Restart Linux:Vi/etc/selinux/config change SELINUX = enforcing to SELINUX = disabled-------------Ref:SELinux IntroductionHow to disable SeLinux without restarting the Linux

In previous articles, I introduced some problems encountered in the configuration process, including "how to download the android source code for Ubuntu Linux", "how to configure the Eclipse development environment for android under Ubuntu11.10,

Two cases:1. directly modify the partition size2. manually create a swap file under the existing partition and then activate the file.//////////////////////////////////////// ////////////////////////////////////////

As we all know, the bochs installed by Apt-get do not contain debugging functions. You must add -- enable-debugger through source code compilation. Now the bochs version on ubuntu source is 2.4.6, but the bochs website has released 2.5.1

1. How to obtain the PID using the scriptSee the script pid. sh as follows: $ Cat pid. sh#! /Bin/shPid = 'ps-aux | grep $1 | grep-v grep | awk '{print $2 }''Echo $ pid $./Pid. sh sshd  2. Convert the file name from uppercase to lowercase. See the

 Uinq is short for unique. I. Introduction Function Description: checks and deletes repeated rows and columns in a text file.   Ii. Syntax Syntax: uniq [-cdu] [-f ] [-s ] [-w ] [-- help] [-- version] [input file] [output file] Note: uniq can check

1. Structure of BSD syslogd: The log files can be viewed in three ways: (1) kernel: Many kernel routines call the log function to generate log messages. In addition, the klogd daemon can listen to and obtain kernel messages and send them to the

1. Go to http://www.oracle.com/technetwork/java/javase/downloads/index.htmlto download jdk-6u30-linux-i586.bin 2. Place it in the/usr/lib/jvm/java directory, and use the chmod command to modify it so that it has the running permission. 3. $

Installation Tools # Yum install yum-utils   Set Source: [Base-src] CentOS-5.4-Base src- Base url = http://vault.centos.org/5.4/ OS /SRPMS/ # Items list = http://mirrorlist.centos.org /? Release = 5.4 & arch = SRPMS & repo = OS Gpgcheck = 1 Gpgkey =

In Unix-like systems, you can use top to view system resources, processes, memory usage, and other information. To view the network status, you can use tools such as netstat and nmap. To view real-time network traffic and monitor TCP/IP connections,

The Nginx configuration file needs to be updated constantly in some cases. Although AWStats now supports output of analysis results in the form of static Web pages, the page layout is not convenient with dynamic web pages generated by Perl, in