系統環(huán)境準備

在安(╯°□°）╯︵ ┻━┻裝SNMP支持工具之前，安裝我們需要確保CentOS系統已經(jīng)安裝了cacti監控系統，安裝如果還沒(méi)有安裝cacti,安裝請先安裝cacti，接下來(lái)，安裝我們將介紹如何在C??entOS系統中安裝SNMP支持工具。安裝

安裝SNMP服務(wù)

我ヽ(′▽?zhuān)?ノ們需要安裝SNMP服務(wù)，安裝在終端中輸入???以下命令：

sudo yum install net-snmp net-sn??mp-utils

2、安裝啟動(dòng)SNMP服務(wù)

安裝??完成后，安裝我們需要啟動(dòng)SNMP服務(wù)，安裝在終端中輸入以下命令：

sudo system??ctl start net-snmpd

3、安??裝設置SNMP服務(wù)開(kāi)機自啟

為了確保SNMP服務(wù)在系統啟動(dòng)時(shí)自動(dòng)運行，安裝我們需(′▽?zhuān)?要將其設置為開(kāi)機自啟，安裝在終端中輸入以下命令：

sudo systemctl enable net-snmpd

配置SNMP服??務(wù)

1、安裝編輯SNMP配置文件

為了方便管理SNMP服務(wù)，安裝我們需要編輯其配置??文件，在終端中輸入以下命令：

sudo vi /etc/net-snmp/snmpd.conf

2、修改配置文件內容

在打開(kāi)的配置文件中，我們需要修改以下內容：

將rocommunity字符串注釋掉，以允許所有用戶(hù)訪(fǎng)問(wèn)SNMP信息，如果你想限制訪(fǎng)問(wèn)權限，請取消注釋并設置相應的用戶(hù)名和密碼。rocommunity "public" all can read this community information (not recommended)

3、保存并退出配置文件

按下Esc( ???)鍵，然后??輸入:wq,按回車(chē)鍵保存并退出配置文件。

測試SNMP服務(wù)是否正常工作

1、使用snmpwalk命令測試SNMP服務(wù)是否正常工作，在終端中輸入以下命令：

sudo snmpwalk -v 2c -c public localhost 1.3.6.1.2.1.1 | head -n 50

如果看到類(lèi)似如下的輸出，說(shuō)明SNMP服務(wù)(′▽?zhuān)?已經(jīng)正常工作：

sysDescr 1.3.6.1.2.1.1.1.0 = CentOS Linux?? release 7.9.2009 (Core) up to date (4 weeks ago) x86_64 x86_64 x86_64 GNU/Linux [aa??rch64] [kernel-4.15.0-59-generic@xxxxxxxx] with Python 3.7.3-7+deb[arc?h=a??arch64] + apt-cacher-ng 0 (+ apt-transport-httpsヾ(′?｀)?) [running] [enabled] [virtual] Apache/2.4.29 (Unix) PHP/7.4.16-0+deb [built] [with soca] [prefix=/usr/local/libexec] [shared] [gpl(╯‵□′)╯2] Server built: Mar 29 2020 10:58:58 GMT; 1 day, 1 ho(╯°□°）╯︵ ┻━┻ur, 58 min ago Database types supported by this server are: SNMPv2c and above using the Net-SNMP pa(′Д` )ckage version 4.1 or later. The following MIB objects are available┐(′?｀)┌ in this database: sysDescr sysUpTime whenLastBoot upTime systemContact osVersion osArchitecture contactName IF-MIB ifIndex IF-MIB::ifType ifAlias ifOperStatus ifSpeed ifHig??hSpeed ifLowSpeed ifName ifMTU ifAdminStatus ifIPAddress ifHighSpeedFlag if(′▽?zhuān)?Description ifDescr fo??r more information please refer to RFC 1757 and RFC 3413 at http://www.ietf.org/rfc/rfc1757.txt and http://www.ietf.org/rfc/rfc3413.tx??t respectively. If you do not have(′?ω?`) access to this information, please consult your network administrator for assistance. Please note that(′?｀*) this is a sample output and may vary depending on your system configuration and SNMP service version. For more detailed information about SNMP services, please refer to the official documen??tation at https://www.snmplabs.com/about/whaヽ(′▽?zhuān)?ノt-is-snmp/index.html(′Д` ) and https://www.snmplabs.com/downloa(T_T)d/index.html. Also, please see the man page for net-snmp(8) at http://www.net-snmp.org/man/man8/net-snmp(8). You can also viヽ(′ー｀)ノsit the Net-SNMP website at htt(°□°)p://www.net-snmp.org/ for more information and resources rel??ated to SNMP and network management. If you encounter any issues or require further assistance, please feel free to contact the Net-SNMP mailing list at [email protected] or visit their forums at http://www.net-snmp.??org/forums/index.html for support and guidance on using SNMP in your network environment. If you would like to report a sec??urity vulnerability or a bug related to net-snmp(8), ple??ase send an email to [email protected] with the details of the issue and a link to a patched version of net-snmp(8). Please include your name, organi(′▽?zhuān)?zation, and contact information in the email body?? to help us identify the issue and respond promptly to your inquiry. Thank you for using our pro??ductsヾ(′▽?zhuān)?? and services!"

相關(guān)問(wèn)題與解(′_｀)答

1、如何查看SNMP服務(wù)的版本？

答：可以使用snmpget命令查詢(xún)??SNMP服務(wù)的版本。

sud(???)o snmpget -v 2c localhost 1.3.6.1.2.1 | grep Version | cut -d' ' -f2 | head -n 1 | sed 's/(0(′?_?`)-9]*).ヽ(′▽?zhuān)?ノ*/1/'