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176 lines
6.5 KiB
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30 Things to Do After Minimal RHEL/CentOS 7 Installation--4
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### 17. Installing Webmin ###
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Webmin is a Web based configuration tool for Linux. It acts as a central system to configure various system configuration like users, disk quota, services and configurations of HTTP server, Apache, MySQL, etc.
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# wget http://prdownloads.sourceforge.net/webadmin/webmin-1.740-1.noarch.rpm
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# rpm -ivh webmin-*.rpm
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Install Webmin
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After webmin installation, you will get a message on terminal to login to your host (http://ip-address:10000) using your root password on port number 10000. If running a headless server you can forward the port and access it on a machine/server that is headed.
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### 18. Enable Third Party Repositories ###
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It is not a good idea to add untrusted repositories specially in production and it may be fatal. However just for example here we will be adding a few community approved trusted repositories to install third party tools and packages.
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Add Extra Package for Enterprise Linux (EPEL) Repository.
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# yum install epel-release
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Add Community Enterprise Linux Repository.
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# rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
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Install Epel Repo
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**Attention**! Extra care is needs to be taken while adding Third Party Repository.
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### 19. Install 7-zip Utility ###
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In the CentOS Minimal Install you don’t get utility like unzip or unrar. We have the option to install each utility as required or an utility that servers for all. 7-zip is such an utility which compress and extract files of all known types.
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# yum install p7zip
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Install 7zip Tool
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**Notice**: The package is downloaded and installed from Fedora EPEL 7 Repository.
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### 20. Install NTFS-3G Driver ###
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A small yet very useful NTFS driver called NTFS-3G is available for most of the UNIX-like distribution. It is useful to mount and access Windows NTFS file system. Though other alternatives like Tuxera NTFS is available, NTFS-3G is most widely used.
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# yum install ntfs-3g
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Install NTFS-3G to Mount Windows Partition
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After installing ntfs-3g has been installed, you can mount Windows NTFS partitions (where /dev/sda5 is my windows drive) using following command.
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# mount -ro ntfs-3g /dev/sda5 /mnt
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# cd /mnt
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# ls -l
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### 21. Install Vsftpd FTP Server ###
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VSFTPD which stands for Very Secure File Transfer Protocol Daemon is a FTP server for UNIX-like System. It is one of the most efficient and secure FTP Server available today.
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# yum install vsftpd
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Install Vsftpd FTP
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Edit the configuration file located at ‘/etc/vsftpd/vsftpd.conf‘ to secure vsftpd.
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# vi /etc/vsftpd/vsftpd.conf
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Edit a few fields and leave other as it is, unless you know what you are doing.
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anonymous_enable=NO
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local_enable=YES
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write_enable=YES
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chroot_local_user=YES
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You may also change the port number and open vsftpd port through the firewall.
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# firewall-cmd --add-port=21/tcp
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# firewall-cmd --reload
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Next restart vsftpd and enable to start at boot time.
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# systemctl restart vsftpd
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# systemctl enable vsftpd
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### 22. Install and Configure sudo ###
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sudo which is commonly called as super do as well as suitable user do is a program for UNIX-like operating system to execute a program with the security privileged of another user. Let’s see how to configure sudo…
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# visudo
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It will open the file /etc/sudoers for editing..
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sudoers File
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Give all the permission (equal to root) to a user (say tecmint), that has already been created.
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tecmint ALL=(ALL) ALL
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Give all the permission (equal to root) to a user (say tecmint), except the permission to reboot and shutdown the server.
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Again open the same file and edit it with the below contents.
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cmnd_Alias nopermit = /sbin/shutdown, /sbin/reboot
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Then add alias with Logical (!) operator.
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tecmint ALL=(ALL) ALL,!nopermit
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Give permission to a group (say debian) to run a few root privilege command say (add user and delete user) .
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cmnd_Alias permit = /usr/sbin/useradd, /usr/sbin/userdel
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And then add the permission to group debian.
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debian ALL=(ALL) permit
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### 23. Install and Enable SELinux ###
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SELinux which stands for Security-Enhanced Linux is a security module at kernel level.
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# yum install selinux-policy
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Install SElinux Policy
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Check SELinux Mode.
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# getenforce
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Check SELinux Mode
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The output is enforcing mode which means SELinux policy is in effect.
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For debugging, set selinux mode to permissive temporarily. No need to reboot.
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# setenforce 0
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After debugging set selinux to enforcing again without rebooting.
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# setenforce 1
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### 24. Install Rootkit Hunter ###
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Rootkit Hunter abbreviated as Rkhunter is an application that scan rootkits and other potentially harmful exploits in Linux systems.
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# yum install rkhunter
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Install Rootkit Hunter
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Run rkhunter as a scheduled job, from a script file or manually to scan harmful exploits in Linux.
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# rkhunter --check
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Scan for rootkits
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RootKit Scan Results
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--------------------------------------------------------------------------------
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via: http://www.tecmint.com/things-to-do-after-minimal-rhel-centos-7-installation/4/
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作者：[Avishek Kumar][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
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[a]:http://www.tecmint.com/author/avishek/ |