Programmer Group

1, New user access [avoid using names such as sshd that conflict with service built-in accounts] In general, for the sake of system access security, the system administrator account will not be directly used for remote access. 2.1 creating users With administrator privileges, execute cmd, execute user addition instructions, and creat ...

Encountered a late case, using scp to transfer files over a long link is unbearably slow! For a 100-200 ms round-trip delay link, wget can download files with a throughput of 40MBps, while scp has only 9MBps. I started to think this was due to bandwidth loss for encryption, but HTTPS testing was okay. To avoid pacing smoothing edge events, se ...

preparation in advance Execute yum update openssh to upgrade first. The official upgrade is okay anyway.If you have previously manually compiled an upgrade of openssh, test yourself for changes to the default profile path.) (Unified openssh version 7.4p1 is prepared here before Unified Compile Installation is upgraded to openssh 8.2p1) [root@n ...

Catalog Local execution Task delegation Task pause Scroll execution Only once Setting environment variables interactive prompt Local execution If you want to run a specific task locally on the control host, you can use the local action statement. Suppose that the remote host we need to configure has jus ...

I really don't understand this: Basis: http : //www.madboa.com/geek/openssl/#key-rsa , you can generate a public key from the private key. openssl genrsa -out mykey.pem 1024 openssl rsa -in mykey.pem -pubout > mykey.pub My initial idea was that they were generated together. Does the RSA private key contain the sum? Or public key? ...

1. Install samba first sudo apt-get update sudo apt-get install samba openssh-server 2. Edit Samba configuration file sudo cp /etc/samba/smb.conf /etc/samba/smb.conf.bak sudo vi /etc/samba/smb.conf Find the [homes] item, which is commented out by default, cancel the comment, and then modify the specific content as follows: #================== ...

1.openssh When the openssh service is enabled in the host, the remote connection interface is opened to the public. The service end of openssh service is open to the public, and the remote connection is open to the public sshd ා server software, open an interface for others to connect through other ways 2. How to connect s ...

In the CenOS 7 system, openssh server is provided by openssh, openssh server and other software packages (installed by default), and sshd has been added as a standard system service. You can execute systemctl status sshd to view the status of the service. As long as you have a legal login shell, you can log in to the operating system remotely ...

Previous Cause: The server was scanned for a SpenSSH vulnerability, so an upgraded version was needed to fix the vulnerability. Server version: # cat /etc/redhat-release CentOS Linux release 7.5.1804 (Core) Pre-upgrade ssh version: # ssh -V OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017 Upgraded ssh version: # ssh -V OpenSSH_8.0p1, OpenSSL 1.0 ...

In the previous chapter, the blogger introduced the architecture of the mainalived + nginx (backup) high-availability system for large-scale Internet projects. I believe you should read the blogger's article and have a certain understanding of the mainalived / nginx technology. In this section, the blogger will share the related technology and ...