UKC

How to list folders with disk usage totals

Re: Show Folders with total disk space used

When finding out where your web space is being used it is useful to be able to list your directories and folders showing total usage for each folder, this allows you to further drill down by concentrating on folders that contain the most usage.

You can perform this task using the du (disk usage) utility:

# du -h --max-depth=1

The output will be in the format as follows:

98M ./wp-content
4.0K ./plesk-stat
4.0K ./picture_library
20K ./css
128K ./test
5.7M ./wp-includes
3.8M ./wp-admin
8.0K ./blogs
144K ./img
4.0K ./tmp
124K ./var
108M .

The -h option shows the usage in human readable form. The –max-depth option ensures we summarise folders in the current directory and not the individual sizes of sub folders.

Plesk 9 SSL Locations: Use Current Obsidian Controls

Current Plesk SSL controls

Plesk 9 is obsolete: manage a website certificate in Plesk Obsidian under Websites & Domains and SSL/TLS Certificates

Do not use old Plesk 9 paths or edit server certificate files directly. Open the correct domain, select SSL/TLS Certificates and use SSL It! or Advanced Settings to issue, upload, assign, renew or inspect the certificate.

Open My HostingChoose an SSL task
OLD GUIDEPlesk 9Superseded interface
CURRENT PATHSSL/TLS CertificatesInside the correct domain
FREE OPTIONLet’s EncryptAvailable through current Plesk

Where are certificate controls now?

  1. 1
    Open Plesk

    Use the hosting service in the UKC Client Area to reach the assigned server securely.

  2. 2
    Choose the domain

    In Websites & Domains find the exact website you want to secure.

  3. 3
    Open SSL/TLS Certificates

    Review the current security status, certificate authority, covered names and expiry.

  4. 4
    Choose the required action

    Use Let’s Encrypt, upload an existing certificate or open Advanced Settings for CSR and repository controls.

Which certificate route should you use?

Free Let’s Encrypt

Issue a trusted certificate for the main domain and required www, webmail or mail names that point correctly to the server.

Existing certificate

Upload the certificate, private key and chain carefully. A mismatched key cannot be fixed by renaming files.

Certificate signing request

Create a CSR in Advanced Settings when an external certificate authority requires one.

Parked-domain SSL

A parked domain uses a separate paid Domain Parking SSL add-on that is provisioned after purchase, usually within minutes.

What should you do after installation?

Test the exact HTTPS hostnames, confirm the browser shows the intended certificate and fix mixed-content errors. Only then enable a permanent HTTP-to-HTTPS redirect. Enable HSTS only after every required hostname and resource works securely, because HSTS can make a broken HTTPS configuration harder for visitors to bypass.

SSL questions

Why did Let’s Encrypt fail?

The requested hostname must resolve to the hosting server and be reachable for validation. Check DNS, redirects and selected names.

Why is the wrong certificate displayed?

Confirm the certificate is assigned to the correct domain and that the hostname reaches the expected server. CDN or proxy settings can also terminate HTTPS elsewhere.

Should I use a self-signed certificate?

Not for a public customer website. It encrypts the connection but browsers do not trust its identity and will show a warning.

Can I edit certificate files over SSH?

Customers should use Plesk controls. Direct server changes can be overwritten, expose private keys or affect other services.

Use current Plesk

Open SSL/TLS Certificates for the exact domain

Test HTTPS before enabling redirects or HSTS.

Open My HostingAsk UKC Support

How to Clear or Flush the DNS Cache

Clear a local DNS cache

Flush DNS when one device still remembers an old website or mail server address

Clearing the local cache removes saved DNS answers from that device, but it does not change the domain’s live DNS records. Check another connection first, then use the correct command for your operating system and restart the affected app.

Show Flush CommandsCheck whether flushing will help
WINDOWSipconfigFlush the resolver cache
MACTerminalRefresh local DNS services
LIMITLocal onlyIt cannot alter authoritative DNS

Will flushing DNS fix the problem?

It may help

The service works on mobile data or another device, but one computer still opens an old address or reports that the host cannot be found.

It will not change live DNS

If every device sees the wrong result, inspect the authoritative records, nameservers and recent DNS changes instead.

Browser cache is separate

Restart the browser or test a private window after flushing the operating system cache.

Other caches can remain

Your router, security software or internet provider can retain an answer until its DNS TTL expires.

How to flush DNS on your device

SystemWhat to do
Windows 10 or 11Open Command Prompt or Windows Terminal as administrator, enter ipconfig /flushdns, then press Enter.
Recent macOSOpen Terminal and enter sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder. Enter the Mac password if requested. No success message is normal.
Linux with systemd-resolvedOpen a terminal and enter sudo resolvectl flush-caches. Other Linux resolvers use different commands.
Phone or tabletEnable airplane mode briefly, reconnect, then restart the browser or mail app. Restart the device if necessary.

What should you do after flushing?

  1. 1
    Restart the app

    Close and reopen the browser, mail client or other affected software.

  2. 2
    Test a private window

    This reduces the effect of a saved browser page or redirect.

  3. 3
    Try another network

    Mobile data helps distinguish the device from the router or provider.

  4. 4
    Check authoritative DNS

    If the problem remains everywhere, review the live zone instead of repeatedly flushing.

DNS cache questions

Will flushing DNS interrupt my website?

No. It clears saved answers only on the device where the command is run.

Will it speed up DNS propagation?

It can remove a local old answer, but it cannot force other resolvers to discard data before the TTL expires.

Why do I still see the old page?

The browser may have cached the page or redirect, or a router or upstream resolver may still hold the old DNS answer.

Should I reset my DNS zone?

No. A local cache issue is not a reason to overwrite authoritative DNS records.

Still seeing the old result?

Compare another device and network before changing live DNS

That quick test reveals whether the issue is local or affects everyone.

Ask UKC Support
Categories DNS

How to resolve “Specifying a character set in HTTP headers can speed up browser rendering”

It is important for a number of reasons why your web site page load speed is as fast as possible. Our previous article “How to speed up your web page load time” explains the importance of the issue.

Increasing your web site performance usually involves a number of small changes to your web page. Some of Google’s PageSpeed suggestions are easier to resolve than others.

The Message:

Google’s PageSpeed reports “The following resources have no character set specified in their HTTP headers. Specifying a character set in HTTP headers can speed up browser rendering.”

The Issue:

Specifying a character set in the HTTP response headers of your HTML documents allows the browser to begin parsing HTML and executing scripts immediately.

The solution:

This is easy if your pages are PHP encoded. Simply add the following line of code to the top of your PHP page:

header(‘Content-type: text/html; charset=iso-8859-1’);

The Result:

Re-run Google PageSpeed and see the warning message vanish!

Parked Domain Not Working? UKC Troubleshooting Guide

UKC parked domain troubleshooting

If your parked domain is not working, check registration, nameservers and DNS in that order

A working UKC parked domain should open a UKC holding page or Website Builder page. If it shows an error, an old website or another provider’s page, use the checks below to find where the connection has broken.

Check My Domain Settings Start troubleshooting
1RegisteredThe domain is active
2DelegatedNameservers point to UKC
3PublishedThe UKC DNS zone responds

Troubleshoot a UKC parked domain step by step

Do not change several settings at once. Work through this sequence, note the result at each stage, and only change the setting that is wrong.

  1. 1
    Confirm the domain is active

    Sign in to your UKC account and check the domain status and renewal date. An expired or suspended registration can stop the website and email from resolving.

  2. 2
    Open both versions of the address

    Test the domain with and without www. Record whether you see a UKC page, an old site, a browser error, a redirect or a certificate warning.

  3. 3
    Check the authoritative nameservers

    The nameservers decide which provider controls the domain’s DNS. A UKC parked domain normally uses the UKC parking pair shown below.

  4. 4
    Review recent changes

    If nameservers or DNS records were changed recently, different networks may temporarily see different answers. Avoid repeatedly changing records while the update is spreading.

  5. 5
    Check the UKC DNS zone

    If the correct nameservers are active but the page still fails, the parking zone may need to be created, corrected or reset by UKC support.

  6. 6
    Separate website and email checks

    A parked webpage can work while email fails, or the reverse. Website records and mail records are different, so report which service is affected.

UKC parking nameservers

A domain using the standard UKC parking service normally delegates DNS to this pair. The UKC aliases shown below point to the same parking service.

Primaryns.microlite1.comUKC alias: ns.ukc.uk
Secondaryns2.microlite1.comUKC alias: ns2.ukc.uk

If your domain uses different nameservers, it may be hosted or parked elsewhere. Do not replace them unless you intend UKC to control the DNS and you have accounted for any website and email records in the existing zone.

What your parked-domain result means

What you seeLikely causeBest next check
UKC parking or Website Builder pageParking is workingUse the included tools or publish your website.
An old website or another provider’s pageNameservers or web records still point elsewhereReview the authoritative nameservers and A or CNAME records.
Server not found or DNS errorRegistration, delegation or DNS zone problemCheck status first, then nameservers, then ask UKC to inspect the zone.
Browser certificate warningThe hostname and certificate do not matchDo not enter personal data. Ask support to check the parked-domain SSL state.
A different website opensWeb forwarding is activeReview the forwarding destination in the domain controls.
Some devices work and others do notDNS caches hold different answersWait for the recent change to spread and test again before editing more records.

Once parking works, choose what the domain should do

Parking is a useful starting state, not the only option. Every UKC domain includes tools that let you put the name to work without changing its registration.

AI

Build a simple website

Use the included Website Builder with AI assistance, unlimited updates and simple visitor analytics.

DNS

Connect another service

Manage DNS records and use presets for services such as Microsoft 365 and Google Workspace.

WWW

Forward web visitors

Send the domain to another website with permanent or temporary forwarding.

@

Forward domain email

Create memorable addresses and forward messages to an inbox you already use.

Parked domain troubleshooting questions

How long should a nameserver or DNS change take?

There is no single guaranteed time. Some resolvers update quickly while others keep the previous answer until its cache expires. Check the current authoritative result and avoid making repeated changes while an update is still spreading.

Why does my phone show a different page from my computer?

The two devices may use different DNS resolvers or cached answers. Test again on the same network, clear browser and DNS caches where appropriate, and allow a recent change time to spread.

Can a parked domain still receive email?

Yes. Web and email traffic use different DNS records. Parking can work while email is configured elsewhere, but changing nameservers without recreating the mail records can stop delivery.

Why do I see a security warning?

The certificate presented by the server may not cover the exact hostname. Do not proceed with passwords or personal information. Tell support whether the warning appears on the root domain, the www address or both.

What should I send to support?

Provide the affected domain through the secure helpdesk, the exact error text, whether www behaves differently, when the problem started, and any recent nameserver or DNS change. Do not post account credentials in public tools.

Need more than a holding page?

Turn the domain into a hosted website

Compare UKC hosting plans when you need a multi-page site, mailboxes, Plesk, security tools and the SiteJet website builder.

Compare Hosting Plans Ask UKC for help
Categories DNS