Click for a PDF with this and four other essential Linux articles. And, if you’ve ever heard anyone say that for Unix, everything is a file, you might not be too surprised to learn that lsof works ...

There are many ways to move files between Unix and Windows. In my mind, they fall into three categories — secure copy (let’s not even think about ftp), shared drives, and file synchronization. Each ...

One of the problems that seems to plague nearly all file systems — Unix and others — is the continuous buildup of files. Almost no one takes the time to clean out files that they no longer use and ...

Unix systems provide numerous ways to compare files. The most common way to verify that you have received or downloaded the proper file is to compute a checksum and compare it against one computed by ...

A lot of information is available about individual files on a Unix system. For example, the ls -l command will display the permissions matrix and ls -i will display a file’s inode. But, if we want to ...

Delete Backs up to erase one character. Backspace Mapped as a backspace key, displaying ^H. Ctrl-u Erases the command line. Ctrl-w Erases the last word on the command line. Ctrl-s Stops flow of output ...

mt positions the tape (winds forward and rewinds). On AIX, this command is tctl. dd converts, reblocks, translates, and copies files. cat concatenates, copies, and prints files. tar saves and restores ...

When transferring text files between Linux/Unix and Windows systems, you may encounter issues with line breaks and file formatting. This is because Windows uses both a line feed (LF) and a carriage ...

It’s been nearly 20 years since I first came across the Useless Use of Cat (UUOC) awards. Unix notable and Perl disciple Randall Schwartz had begun handing out these embarrassing awards around 1995 to ...