How do I free up more space in /boot?



How do I ...?

How do I login?

What version of OpenWrt do I have installed?

As you can see here development, there are always two branches which are being actively worked on. OpenWrt trunk, which is bleeding edge, codename 'Designated Driver', and the current stable release. Do

cat /etc/banner

to see the exact revision. Use that information for bug reports and questions in the forum. Also use it, to look up information yourself:

I forgot my password!

I have no WebUI

How do I use the CLI (command-line interpreter)?

How do I access the syslog messages?

Unless you installed some other log daemons, OpenWrt uses by default busybox-klogd and busybox-syslogd for logging. Both use the same circular buffer, which can be accessed with the command


How do I recover / boot in failsafe mode?

There are three WebUIs available. All are , thus you...

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Low Disk Space
How to free up hard drive space on your Laptop or PC

How do I free up disk space on my laptop. My hard drive is nearly out of free space. I keep getting a low disk space warning. This article is just the ticket for those of you who love your laptop or anyone who wants to free up space on their hard drive. It’s still not uncommon to find laptop computers that are only a few years old but have a 20 to 40GB hard drive installed, so you will find a number of things to help reclaim some of that lost disk space. Even users with large hard drive can benefit by reducing your AV scan times.

Windows ‘Disk Cleanup’ Utility:
A basic tool that should be run periodically to free up space on your C: drive.
Description of the Disk Cleanup Tool in Windows XP:
Note: Always start out by choosing the less aggressive options.

Next take a look at CCleaner:

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Every day millions of Windows machines are booted up and everyday millions of people sit idly by waiting for Windows to load onto the desktop. The amount of time wasted can probably be measured in weeks considering how slow most Windows PCs boot up! Thankfully, there are a lot of steps you can take to speed your computer’s boot time.

In this article, I’m going to mention 14 different ways I have speed up my PC over the years and hopefully you’ll find that they work for you also. Some you can implement immediately whereas others would require buying new hardware or changing your operating system. I’m not going to mention buying a new computer as that’s an obvious solution. The point is to speed up boot times without having to drastically change your current setup.

Before we get to the list, I wanted to mention that I had written separate articles on quite a few of the tips for improving boot times, so it’s a good idea to check out each link as it will go into detail on...

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By Tom Nelson

Updated June 21, 2016.

Question: How Much Free Drive Space Do I Need?

What's the minimum amount of free drive space that I need? My Mac is starting to operate slowly, taking a long time to boot or to launch an application. It also seems unstable, sometimes giving me the rainbow cursor for very long periods of times, even locking up completely.

Do I need a bigger drive?


There are many different types of problems that can manifest the symptoms you describe. Insufficient RAM or even hardware failure could be the culprit. But one of the most common causes of the problems you describe is not having enough free space on a startup drive.

Filling your startup drive until it's almost full is fraught with issues. First, your Mac needs some free space to use for creating swap space to manage memory use. Even when you have adequate RAM, OS X or the newer macOS will reserve some space at startup for memory swap space. In...

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While updating a client’s CentOS 6 server using “yum update” I ran into the following error:

Transaction Check Error: installing package kernel-2.6.32-358.2.1.el6.x86_64 needs 11MB on the /boot filesystem
Error Summary
Disk Requirements: At least 11MB more space needed on the /boot filesystem.

To check the free space on /boot I ran the following command: df -h

Which gave the following output:

Filesystem Size Used Avail Use% Mounted on
/dev/vda3 136G 60G 70G 46% /
tmpfs 5.3G 0 5.3G 0% /dev/shm
/dev/vda1 99M 77M 17M 82% /boot
/usr/tmpDSK 1.3G 35M 1.2G 3% /tmp

As you can see the boot partition is 82% full.

To list installed kernels use this command:

rpm -qa | grep kernel

The result:


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Surface comes with a built-in tool to create a USB recovery drive. To create a recovery drive, you'll need an external USB drive formatted to FAT32, with enough available storage space for all your recovery data.

Step 1: Swipe in from the right edge of the screen, and tap Search.
(If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, and click Search.) Step 2: In the search box, enter recovery, and in the search results, tap or click Recovery, and tap or click Create a recovery drive. Step 3: In the User Account Control dialog box, tap or click Yes. Step 4: Tap or click Copy the recovery partition from the PC to the recovery drive, and tap or click Next.

The next screen will indicate how much storage space is available on your USB drive.

Step 5: Tap or click Cancel to close the recovery drive tool. Step 1: Connect the power supply to your Surface and plug into an electrical outlet. Step 2: Insert your USB drive...
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A full startup disk is something that every Mac user will experience. And luckily, it’s a problem that has many solutions. In this article, we’ll go over:

What is startup disk full? How to find what's causing startup disk full? How to fix startup disk full? How do I prevent startup disk full in the future?

However, we also understand that some people are short on time and just want to fix startup disk full. So, if you’re not really interested in what it is and why it happens, just skip the next two sections and head to “How to Clean Your Startup Disk”.

Or, even better, if you’d like an automatic, long-term solution that’ll keep your startup disk clean, we’d highly recommend a utility called CleanMyMac 3. It'll help you clean up gigabytes of disk space in just minutes (you can download it here).

Now, with all that said, let’s get into what exactly “startup disk full” means.

Understanding What “Your Startup Disk is Full” Means

What is...

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System Requirements

You need support software (drivers) installed with Boot Camp to use Windows 10. This software is automatically downloaded when you use Boot Camp Assistant. Boot Camp supports 64-bit versions of Windows 10 when used with a supported Mac.

Windows 10 is available from Microsoft as an ISO file and a USB flash drive. You need an ISO file of the 64-bit version of the Windows 10 installer to install Windows on your Mac. If you purchased the USB flash drive version you can download an ISO from Microsoft and use the Windows installation key that came with your flash drive. If you're installing Windows for the first time, make sure the Windows installer you're using is for a full installation (not an upgrade installer).

Perform a new install of Windows 10

Use these steps if you're installing Windows on your Mac for the first time:

Use the list at the end of this article to make sure you have a Mac that supports Windows 10. Check for...
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Georgetown University will treat descendants of 272 slaves in the school’s past as they would treat legacy applicants in the admissions process, the university announced Thursday as one in a series of steps it will take to address its associations with slavery. The Jesuits who founded Georgetown sold 272 slaves in 1838 and used the proceeds to pay off the university’s debts. Georgetown University President John J. DeGioia announced the measures in response to a report from the school’s Working Group on Slavery, Memory, and Reconciliation, which DeGioia convened in 2015 to examine Georgetown’s association with slavery, and how it should respond now. The descendants of those 272 people have been involved with the working group in the last year, and the university today said they will get the preferential admissions status that descendants or siblings of other Georgetown students and alumni currently have.

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You've a lot unused kernels. Remove all but the last kernels with:

sudo apt-get purge linux-image-{3.0.0-12,2.6.3{1-21,2-25,8-{1[012],8}}}

This is shorthand for:

sudo apt-get purge linux-image-3.0.0-12 linux-image-2.6.31-21 linux-image-2.6.32-25 linux-image-2.6.38-10 linux-image-2.6.38-11 linux-image-2.6.38-12 linux-image-2.6.38-8

Removing the linux-image-x.x.x-x package will also remove linux-image-x.x.x-x-generic.

The headers are installed into /usr/src and are used when building out-tree kernel modules (like the proprietary nvidia driver and virtualbox). Most users should remove these header packages if the matching kernel package (linux-image-*) is not installed.

To list all installed kernels, run:

dpkg -l linux-image-\* | grep ^ii

One command to show all kernels and headers that can be removed, excluding the current running kernel:

kernelver=$(uname -r | sed -r 's/-[a-z]+//') dpkg -l linux-{image,headers}-"[0-9]*" | awk '/ii/{print $2}' |...
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My computer locks up and won’t boot. What do I do?

Your computer locks up, crashes, stalls or otherwise fails to completely boot up into Windows. That’s particularly painful, since most all of our diagnostic tools require that Windows be running. Diagnosing the problem with a computer that won’t boot can be difficult.

In this article we’ll look at some of the resources that you do have available, and try to gather a little information about the type of problem you might be experiencing.

I’ll start at a successfully booting Windows, and work backwards to a completely dead machine.

• Loading User Settings

One of the last steps that Windows takes before being ready for use is to load the personal settings for the user logging in. That includes settings within the Windows Registry, saved network connections, and the security settings for the account. This step exercises a lot of different areas on the machine, so if it hangs, or is exceptionally...

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10 Ways to free up hard drive space on Windows lists ten methods to analyze and clear used hard drive space on Windows computer systems.

While you might say that such a guide is no longer necessary, as we are in the age of the Terabyte hard drive, I respectfully have to disagree.

First, older computers running Windows may not use a Terabyte drive as the main hard drive of the system. Second, Solid State Drives, while slowly picking up pace in regards to storage, are mostly used as 512 Gigabyte or less drives. In some cases, computers may have a 120 Gigabyte SSD or even less than that as the main system drive.

If you check out Microsoft's newest Surface device, the Surface Pro 4, you will notice that two models come with 128 Gigabyte of storage only.

Last but not least, even if your computer has plenty of space, you may want to free up drive space anyway as most of it is dead weight.

10 Ways to free up hard drive space on Windows


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"Quick boot" redirects here. For the feature of the Quarterdeck memory manager, see

Quickboot (QEMM)


This article is about bootstrapping operating systems. For the general concept, see



In computing, booting (or booting up) is the initialization of a computerized system. The system can be a computer or a computer appliance. The booting process can be "hard", after electrical power to the CPU is switched from off to on (in order to diagnose particular hardware errors), or "soft", when those power-on self-tests (POST) can be avoided. Soft booting can be initiated by hardware such as a button press, or by software command. Booting is complete when the normal, operative, runtime environment is attained.

A boot loader is a computer program that loads an operating system or some other system software for the computer after completion of the power-on self-tests; it is the loader for the operating system itself. Within the hard reboot...

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** If you're looking to free up disk space and reduce the size of the WinSxS directory on Windows Server 2008 R2, make sure to check out the following blog post on this topic**


A few months back, I wrote a post on how to reduce the size of the WinSxS directory and free up disk space on Windows Server 2012.

As a recap, the WinSxS directory is a large consumer of disk space on Windows Clients and Servers. Over time, the WinSxS directory steadily increases in size.

So why is this?

One cause of this is Windows Updates. To allow the ability to uninstall an update, all the previously installed versions of Windows Updates are kept in WinSxS directory even when they become superseded by an update released in future. This accounts for Windows updates taking a lot of space and it continues to grow significantly as more and more updates are installed.

So how do we cleanup the WinSxS directory? Well, with each service...

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If clutter and insufficient internal storage space on your Android are getting you down, then read on: this article won’t just tell you to clean caches, uninstall apps and the like (which we believe are only marginally and temporarily effective), but will get to the heart of the problem with recommendations that make a significant impact.

The thing is: for those of us who have insufficient storage problems, clearing caches and junk files has become a weekly – if not daily – ritual. But it isn’t supposed to be this way: there are better interventions out there that are a lot more significant, that can really make a dent in freeing up space from your Android’s internal storage. This post compiles TEN interventions in total and ranks them according to the potential impact they can have.

There are three ‘categories’ of interventions that you can perform, as follows:

Those that can be done on any Android device. Those that require an external SD card connected to your...
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Hard drives are getting larger and larger, but somehow they always seem to fill up. This is even more true if you’re using a solid-state drive (SSD), which offers much less hard drive space than traditional mechanical hard drives.

If you’re hurting for hard drive space, these tricks should help you free up space for important files and programs by removing the unimportant junk cluttering up your hard disk.

Free Up Disk Space the Easy Way with CleanMyPC

If you want to clean up your PC and free up disk space the easy way, CleanMyPC is a great tool to get the job done easily, and it will even keep your computer clean automatically.

Unlike the competition, it also includes great tools like a Clean Uninstaller, to get rid of applications and also clean up the junk that they leave behind. All with the click of a button.

Run Disk Cleanup

Windows includes a built-in tool that deletes temporary files and other unimportant data....

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I created "PatchCleaner" to clean the windows installer directory of all orphaned files in one easy click. If you don't trust the app to do the right thing, use the move feature to put them somewhere safe in case you need them back in the future. I have run it on multiple machines and saved up to 15Gb of space :-)

Run PatchCleaner after windows updates to find newly orphaned files.

I recommend you use the Move action, and move the orphaned patches to external storage, just to be safe

PatchCleaner @ HomeDev

Known Issues (full details on website)

Adobe Reader can fail to update after running PatchCleaner.

NOTE: as @ Feb-2016 version is out that has a fix to allow customisable filters to exclude adobe reader from being incorrectly...

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