The best live for admin, techies and for all those who need an effective tool to manage and rescue their PCs.
System Rescue CD has everything you need to manage partitions, recover data, make backup, clone your system , check disks etc...
It runs very well on old machines as well and, last but not least, it's often updated, so you always have the last (but stable) kernel and tools like gparted, ddrescue, fsarchiver, smartmontools etc...
There are meny good multitool live disks but System Rescue CD is the number one and my first choice, especially when the going gets tough!
It's your swiss knife you need to keep in your pocket.
Somebody says it's not for newby and beginners... Let's face it: there are few tools you can easily use just with one click! Yes, you need to learn about linux and it's commands, but you don't need to know everything: you can learn it step by step and learn what you need time after time. No hurry! Its' a good way to learn Linux in general too without messing with your installed distro.
A powerful swiss army knife for admin tasks.
And a must have for emergencies.
The image shouldn't require extra work to make it USB bootable.
But nevertheless - it's a project you should have in your toolbox.
The GUI makes it easier for novice users to access and use.
Pro users can stay on CLI level and hack away.
Also consider similar projects like GRML and Finnix.
These are also projects that are still alive and also very powerful and help you sleep at night.
Finnix and GRML (the small version) are CLI only so beware.
SysResCD - a first aid kit you should have in your drawer.
I use it. I like it. I always try to a current version on a usb stick though it can be a bit knarly to install it there. It is handy when one's linux 'daring do' gets away from you and there is a crash and burn situation. Been there.