The sshd (Secure Shell Daemon) service is part of the OpenSSH implementation for Linux that provides authenticated, end-to-end encrypted networked communication. For example, a user on one host can log in to another system without using a password because the sshd service can be configured to use alternate authentication techniques such as exchanging shared-key information. OpenSSH uses a client/server technology. A client, such as a user running the ssh program, initiates a connection to the … [Read more...] about Linux OS Service ‘sshd’
Linux Services
Linux OS Service ‘nscd’
This is the Name Service Cache Daemon. It takes care of group and password lookups for running programs and then caches the lookup results for the next query for services that can experience slowness in picking up changes such as NIS or LDAP. If you’re running these services, you may want to run nscd. This daemon can cache data for name services, /etc/hosts, DNS, NIS, NIS+ etc. This is only for local users on the machine, because the cache is realized by wrapping the functions in glibc, … [Read more...] about Linux OS Service ‘nscd’
Linux OS Service ‘squid’
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Squid offers a rich access control, authorization and logging environment to develop web proxy and content serving applications.The Squid caching proxy server can also be configured as a reverse proxy to redirect http (Port 80) connections. When acting as a reverse proxy, the cached content is delivered from the proxy server to the client without exposing the origin of the web server or data on the internal … [Read more...] about Linux OS Service ‘squid’
Linux OS Service ‘xendomains’
The xendomains service automatically starts, stops, and migrates Oracle VM clients (domU) as the Oracle VM server (dom0) boots or shuts down. In essence, the xendomains service automatically issues a series of xm commands to ensure the proper Oracle VM clients are started and stopped as the dom0 server is started or stopped. No daemons or other background processes are controlled by the xendomains service; only dom0 client virtual machines. Part of the Oracle VM Server product, the … [Read more...] about Linux OS Service ‘xendomains’
Linux OS Service ‘ldap’
Linux provides both server-side and client-side support for the Lightweight Directory Access Protocol (LDAP) facility. This is a standards-based facility, so it is compatible with other LDAP implementations, including Microsoft's Active Directory. Data suitable for a directory service has low volatility as LDAP is optimized for read-mostly access; database systems are tailored for more volatile data. A classic example of data suitable for directory services is the ordinary telephone … [Read more...] about Linux OS Service ‘ldap’
Linux OS Service ‘yppasswdd’
The yppasswdd service executes the yppasswdd daemon. The yppasswdd is a part of NIS (Network Information Service formerly Yellow Pages) server. This server allows users to change their password on a NIS server from a NIS client. The service must be run on the NIS master server for that NIS domain in conjunction with ypserv, the NIS server daemon. When a yppasswd client contacts the server, it sends the old user password along with the new one to rpc.yppasswdd which will search the system’s … [Read more...] about Linux OS Service ‘yppasswdd’
Linux OS Service ‘named’
The named service executes the DNS (Dynamic Name Service) server daemon. It converts host names to IP addresses and vice versa. There are several different kinds of DNS servers, such as primary server, slave server and cached server etc. Its data is stored in the directory /var/named. The Domain Name System (DNS) is the hierarchical, distributed database. It stores information for mapping Internet host names to IP addresses and vice versa, mail routing information, and other data used by … [Read more...] about Linux OS Service ‘named’
Linux OS Service ‘vncserver’
Linux OS Service 'vncserver' executes a VNC server daemon, which is used to start a VNC desktop and simplifies the process of starting an Xvnc server. It runs Xvnc with appropriate options and starts some X applications to be displayed in the VNC desktop. VNC is the abbreviation of Virtual Network Computing. VNC has two components. A server, which runs on the remote computer and a viewer, which runs on a workstation. With VNC, you are able to view and fully interact with the VNC server … [Read more...] about Linux OS Service ‘vncserver’
Linux OS Service ‘nfslock’
The Network File System (NFS) is a client/server protocol that allows a directory hierarchy located on an NFS server to be mounted on one or more NFS clients. Once this is done, the NFS client can transparently access the NFS server files. The NFS server-side daemons arbitrate simultaneous access by multiple clients. Entire files, or individual regions of files, can be locked by a client to avoid race conditions caused by concurrent modification or by viewing partial updates. The nfslock … [Read more...] about Linux OS Service ‘nfslock’
Linux OS Service ‘hplip’
HPLIP is an HP developed solution for printing, scanning, and faxing with HP inkjet and laser based printers in Linux. The HPLIP project provides printing support for 1,292 printer models, including Deskjet, Officejet, Photosmart, PSC (Print Scan Copy), Business Inkjet, LaserJet, Edgeline MFP, and LaserJet MFP. (Note: Not all models are currently supported). The Hewlett-Packard Linux Imaging and Printing project (HPLIP) provides a unified single and multi-function connectivity solution for … [Read more...] about Linux OS Service ‘hplip’