The fuser utility in Linux is a powerful tool. As the name suggests it gives information about file user or the process that is currently using the file or directory. But fuser functionality is not just limited to giving information about the process. The article explains how to use fuser utility with 5 practical examples.…
Network Address Translation (NAT) is the process where a network device, usually a firewall, assigns a public address to a computer (or group of computers) inside a private network. The main use of NAT is to limit the number of public IP addresses an organization or company must use, for both economy and security purposes.…
A common problem with computers is when you have a number of large files (such as audio/video clips) that you may want to get rid of. You can find the biggest files in the current directory with: ( only in current directory ) ls -lSrh (the r causes the large files to be listed at…
One of the defining features of Linux and other UNIX-like operating systems is that “everything is a file.” This is an oversimplification, but understanding what it means will help you understand how Linux works. Many things on Linux appear in your file system, but they aren’t actually files. They’re special files that represent hardware devices,…
Most of you are very familiar with ping command which is most commonly used to check any network device is alive or not. A very simple and useful command. And if we can add date/time stamp in it, it will be more helpful to generate a good statistics. It is very easy in Linux without…
Unix and windows file formats are different. Sometime a Unix file which edit in Windows put a special character at the end of each line i.e ^M (CTRL+M). It can make that file useless sometime. But no worry you can fix that with ease, just follow the procedure given below: Open the file in vim…
tcpdump is a command line network sniffer, used to capture network packets. When you have only command line terminal access of your system, this tool is very helpful to sniff network packets. It has so many options: you can see the packet dump in your terminal, you can also create a pcap file (to see the…
Openssl is one of the best tools which can be used to encrypt/decrypt files. You can password protect your important data to avoid misuse. To encrypt your files use the command: openssl des3 -salt -in $FILENAME -out ${FILENAME}.des3 To decrypt the file use the command: openssl des3 -d -salt -in ${FILENAME}.des3 -out ${FILENAME} You can…
The stats helper monkeys at WordPress.com mulled over how this blog did in 2010, and here’s a high level summary of its overall blog health: The Blog-Health-o-Meter™ reads Fresher than ever. Crunchy numbers A Boeing 747-400 passenger jet can hold 416 passengers. This blog was viewed about 11,000 times in 2010. That’s about 26 full…
Linux Explore stats month September 2012