Unfortunately, it happens rather often recently that Red Hat Package Manager (rpm) just hangs during some operation. After it does so, rpm stops working completely and even reboot (hehe) doesn’t help. Well, the problem is well known and is in Red Hat’s bugzilla. For now, here is a quick fix for you.
Continue reading Fix RPM process hanging on a Red Hat Linux installation
Ok, we all know that to repeat the last command in bash (as well as many other shells) you just need to press the Up key. Sometimes though it is handy to test a command before using it as a subset of a bigger command.
We all use gzip-ped tar achrives (.tar.gz) like mad. Sometimes, though, we need to check if the file is in the archive without extracting the whole damn thing on to the poor hard disk :)
Now, calm down, we are not talking about tar(1) or cpio(1) backups. Sometimes, there is a need to make a temporary copy of a few files and then copy them back to original filenames. Let’s say you have a directory with few config files and you want to copy each config file to filename.orig, and then, later, restore it to the original name. Here is how you can do it… Continue reading Temporary backup of a few files
It is very often that one has a need to rotate a bunch of images by 90 or 180 degrees clockwise or otherwise, or resize the same bunch of images to a certain size. Read more to learn how you can do it.