Linux and UNIX Systems Configuration Help, How To, Tutorial and Basic Information

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Tags: [how to, linux, unix, network, secure, SSH, connection]  ...
Tags: [network, port, number, linux, unix]  ...
... allowing specific IPs, the default policy must first be set to DENY to be effective. edit /etc/hosts.deny and add the following line: sshd: ALL Add to /etc/hosts.allow the network you want to allow. For ...
To View a port number type in terminal for full list: cat /etc/services for one you need: cat /etc/services | grep (port number or service) View /etc/services file.
...  Sytem Configuration # system-config-network # system-config-display # system-config-packages # system-config-... Show Logical Volums # mcedit /etc/fstab Get Swap Size # cat /proc/swaps ...
... 192.168.5.1:8888 cache_peer [your_proxy] parent 8080 0 no-query cache_dir ufs /var/spool/squid 5000 16 256 acl clients src [your clients' network, ex. 192.168.5.0/255.255.255.0] acl all src 0.0.0.0/0.0.0.0 ...
Configure Network # netconfig Get Network Status # netstat # ifconfig Get Route Information # route Get Network Cards # lspci | grep -i ethernet Dump TCP Packages to View # tcpdump Dump TCP Packages Into ...
Here are listed default port numbers (full /etc/services file) # /etc/services: # $Id: etcservices.txt,v 1.2 2005/12/18 13:54:31 francis Exp $ # # Network services, Internet style # # Note that ...
... network, etc.) /root Root's directory /sbin Basic system software /tmp Temporary files /usr Directory impracticable important files /var Various data (logs)  ...
The Seven Layers of the OSI Model 7 Application Network Process to Application   Provides network services processes to application processes (such as electronic mail, file transfer,...) Provides ...
Network Information ...
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Thanks David Ayvazyan for provided useful information and discussions.
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