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] [device [device [device]]]-V: Displays the version information, note the capital letter V.-D: Delayed update refresh rate, in seconds. The default value is 1.-T: Trace mode.-b:bug Hunting Mode-means the tracking mode.-P: Mixed mode (not recommended).Device: The name of the device to monitor. Default is Eth0When Nethogs is running, press:Q: ExitM: Toggle between Total and current usage modeFind the process of a large number of packages, then kill, in the process of troubleshooting what the prog

, from the early morning to work this period of time we have not issued an alarm, timely notify the relevant personnel, so we need to establish monitoring and alarm systems. There are many open-source monitoring frameworks, such as Zabbix. 2. The code quality needs to be improved, and public methods need to write the relevant documentation.3. Establish the relevant security group to reduce the port of the exposed public network.This article from "Cheng Xiao Bai" blog, declined reprint!

, with a DB representation database, without the presentation of the website files, each site will eventually have 14 files (7 database backup, 7 Web site file backup).④, seven cows backup:Consistent with local data, the seven KN sync tool also has the advantage of determining whether a file is updated with a hash value, rather than synchronizing the same file repeatedly, so the daily seven-cow synchronization will only synchronize the backup package that was generated on the day.Vi. OutlookThis

# Installing the SNMP service yum-y install net-snmp# Modify the SNMP service configuration file Sed-i '/^access/s/systemview/all/;/^ #view all/s/#//'/etc/snmp/snmpd.conf# If you don't want your SNMP service to be accessed by others, you can limit it in the following two ways: # 1.Modify the SNMP service configuration file to be set to only one host to access: # sed-i '/^com2sec/s/default/1.2.3.4/'/etc/snmp/snmpd.conf# 2. Restrict access to the UDP161 port through the firewall. # Restart SNMP Se

Method OneSuppose we currently have two servers:(A) *.111(B) *.222Now we are going to copy all the files in the/temp/directory on the *.111 server to the/test/directory of the *.222 server;Let's do the command line mode:Type the following directive:SCP root@*.111:/temp//test/#注解 as root into the remote *.111 server, the *.111 server/temp/and the following files are copied to the *.222 of the local server/test/directory;method Two: The easiest way to t

Objective: This paper mainly introduces the use of Squid and Squidguard configuration Proxy server in Linux, with the WWW Proxy service as an example to explain how to filter harmful sites and restrict users ' access to the Internet. I. INTRODUCTION Squid is the most popular proxy server software under Linux, it is powerful, support for Http,ftp,gopher,ssl and WAIS, and other protocols agent; Simple to s

iirsuser/"Iirsuser" @orcl directory=dir_iirsuserbaknew dumpfile= Expiirspublish20170814.dmp Remap_tablespace=iirspublish:iirsuser Remap_schema=iirspublish:iirsuser logfile= Impdbiirspublish20170814.log transform=oid:n The 5th step requires the exit (exit) SQL command line to execute under the Oracle account. What you need to explain is: IMPDP username/password @sid directory= directory dumpfile= The instance name EXPDP the old database. DMP remap_tablespace= Old Database space name: New databas

emptying all caches.View:[Email protected] ~]# cat/proc/sys/vm/drop_caches4, redundant data timely deletion, production data backup;Test[Email protected] ~]# uname-aLinux testserver 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT x86_64 x86_64 x86_64 gnu/linux[Email protected] ~]# free-mTotal used free shared buffers Cachedmem:2013 1661 352 0 223 1206-/+ buffers/cache:231 1782swap:2047 0 2047[[Email protected] ~]# Sync[[Email protected] ~]# Sync[Email p

implement a cyclic serverTCP The Loop server accepts a client connection and then processes, disconnects after all requests for this client have been completed. The TCP loop server can only process requests from one client at a time, and the server may continue with subsequent requests only after all requests from the client are satisfied. If there is a client that does not hold the server, the other clients do not work, so the TCP server is generally rarely used in the loop server model. TCP t

How to implement a cyclic serverTCP The Loop server accepts a client connection and then processes, disconnects after all requests for this client have been completed. The TCP loop server can only process requests from one client at a time, and the server may continue with subsequent requests only after all requests from the client are satisfied. If there is a client that does not hold the server, the other clients do not work, so the TCP server is generally rarely used in the loop server model

, consider thread synchronization.3. Service when client thread exits, exit processing (exit value, works thread is in detached state)4. System load, as the number of linked customers increases, causing other threads to be unable to stage the CPU .server code [ In actual development, pay special attention to function call return value judgment ] #include multi-threaded and multi- process by Model CPU debugging in Linux, so the use of multi-threaded a

end of a string.Example:C:\Documents and Settings\user>echo%date%2012-08-08 WednesdayC:\Documents and Settings\user>echo%date:~5,10%08-08 Week ThreeC:\Documents and Settings\user>echo%date:~5,4%08-0C:\Documents and Settings\user>echo%date:~5,5%08-08Cwrsync Command Explanation:Rsync.exe--delete-az "/cygdrive/d/adbackup/addata" [email protected]::adbackup--password-file=]/cygdrive/d/ Adbackup/command/cwrsync/pass.txt "--delete-az de-sync to keep both ends of the file consistent"/cygdrive/d/adback

What is the Mahjong card character, is the Chinese display as a vertical rectangular box inside there are four numbers or letters, please fancy Chinese, Japanese and Korean display will know:Why do you encounter this problem?The system does not support Chinese, Japanese, and Korean fonts.How to resolve:Installs Chinese fonts, Japanese fonts, and Korean fonts.Reference:1. How to install multi-language packs under Linux2.linux Install Chinese Language p

This experiment is passed in the Centos/RHEL system. For other versions of linux/Unix, you only need to make appropriate modifications. This script requires that the SSH service must be enabled on the Unix-like server you manage, public and Private keys have been set for automatic login. For more information, see autologinforssh. #! /Bin/bash # byService-Labshttp: // www. service. labs. This experiment is passed in the Centos/RHEL system. For other ve

This article mainly introduces how to implement batch password modification and generate an execl example for linux servers using python. For more information, see batch linux server password modification and generate an execl table. The code is as follows: #! /Usr/bin/env python# Coding: utf8# Randomly generate a custom length passwordFrom random import choic

: This article mainly introduces common commands for linux server operations. For more information about PHP tutorials, see. Ps-ef | grep *** view the process Killall nginx clear nginx Cd .. remove a directory Cd/enter the root directory Tail-f catalina. out view tomcat logs in real time Top # Sort by shift + m by memory usage. Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permi

,NormallyWindows login, You must select "close" again after the first normal startWindowsAnd Log On As another user.IBMDownload a patch under the website for repair. 2.If you download a single file, you do not need to map the drive letterSambaThe server is also setHttp server,In the browserHttp: // sh3/pubAccess. For more information, see other books. Related Articles] Parsing the configuration file of Linux Samba Server Set up Sa

Fix tomcat garbled characters on linux servers. 1 Ensure that the linux server uses UTF-8 Local-a: view supported Fonts Change vi/etc/sysconfig/i18n to zh_CN.UTF-8 2. Change the Client code such as Xshell, putty, and SSH Secure Shell Client to UTF-8. 3 modify the server. xml file encoding to UTF-8 URIEncoding = "UTF-8" 4. Modify the catalina. sh File If [

Remotehost.cfg.Change the host_name and alias in the host block to the name and alias of the corresponding remote server, and change the address to the IP of the remote server.The definition of Host_group can be deleted, and the name of the remote server is added to the Host_group block in Localhost.cfg, which is written behind localhost, separated by commas.In all of the following services definitions, change the host so that it is available.In/usr/local/nagios/etc/nagios.cfg, add a cfg_file i

process ――nethogs 1. nloadNload is a command-line tool that allows users to separate and monitor both inbound and outbound traffic. It can also draw charts to show inbound traffic and outbound traffic, and the view scale can be adjusted. It is simple to use and does not support many options.Press Enter or left and RIGHT arrow keys to switch the NIC.So, if you just need to quickly see the total bandwidth usage without the details of each process, then nload is handy.Device eth1 [SSF] (2/3):