Flush DNS Cache in Catalina

[Dittoman1]

I use Terminal and I type in what it recommended then was prompt with Password, which password do I put in.. My daily sign in PW or Apple PW?? when I type I dont see letters I type at all?? Any advise

 

[ferrarr]

The password used in Terminal, is your macOS user account password. Not displaying "any input", is normal for terminal.

 

[Raz0rEdge]

Your account password and you shouldn't see anything being typed since that's the whole idea of the security, not knowing how many characters the password is.

If you enter it wrong, it will prompt again. Fail 3 times and it will just stop and you have to enter the command again.

Why do you think you need to flush the DNS cache?

 

[Dittoman1]

I get Apple news letter and was advised to do this once in a while so I thought to try it. Maybe I should nt do it since I have no problem. Heres the articles:

How to Flush DNS Cache in MacOS Catalina & Big Sur

MacOS users may occasionally need to flush DNS cache on their Macs in order to access certain websites, domains, or for troubleshooting purposes. Flushing DNS cache is particularly common with web …

osxdaily.com

 

[Dittoman1]

Your account password and you shouldn't see anything being typed since that's the whole idea of the security, not knowing how many characters the password is.

If you enter it wrong, it will prompt again. Fail 3 times and it will just stop and you have to enter the command again.

Why do you think you need to flush the DNS cache?

Yes you re right, I know my password but failed 3 times??

 

[Raz0rEdge]

Yes you re right, I know my password but failed 3 times??

Are you sure? Whatever password you use when you login or are promoted to install applications is the one you use here.

 

[Dittoman1]

Are you sure? Whatever password you use when you login or are promoted to install applications is the one you use here.

I use 2 different PW , one when I log in in the morning, if I install app, I use apple PW. I tried both and falied

 

[Raz0rEdge]

Can you tell us what command you are using, so we can see what's going on.

 

[Dittoman1]

Can you tell us what command you are using, so we can see what's going on.

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder. I use space between letters, maybe I should nt??

 

[Raz0rEdge]

Space between characters in your password? Not sure what you mean.

 

[Dittoman1]

Space between characters in your password? Not sure what you mean.

No, I mean space using sudo---- like below, not sure if I m supposed to
sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

Tried it 3 more times failed... never works for me

 

[chscag]

Ron:

Forget using the Terminal. Just run OnyX and use its defaults. OnyX automatically flushes the DNS cache.

 

[Dittoman1]

Ron:

Forget using the Terminal. Just run OnyX and use its defaults. OnyX automatically flushes the DNS cache.

Oh really, but still like to use Terminal to gain my knowledge but why do I failed. Still not sure if I should use my sign in or Apple password . I even did both and still dont work,

 

[chscag]

Ron:

I just tried it with using the Terminal and it works okay for me. I just typed in my admin password when it asked for it. The password of course is hidden from view, but it works just the same. I don't know what you're doing wrong?

Are you sure you're using your Admin password? That would be the same password used for installing apps and making changes.

 

[IWT]

Hi Dittoman1,

The admin password you use to log in to your Mac is the same one you use to allow an app to make changes within your Mac.

That admin password is used for all things related to the running of your Mac including Terminal.

Your Apple Password relates to strictly Apple ID matters such as iCloud, iTunes purchases, syncing apps via iCloud etc.

It should have nothing whatever to do with Terminal.

Because Terminal does not show your password when you type it - for security reasons - you shouldn’t assume that a failure is due to that. It is much more likely that the input code is incorrect. I’d check that first and stick with your admin password.

Ian

 

[Dittoman1]

Hi Dittoman1,

The admin password you use to log in to your Mac is the same one you use to allow an app to make changes within your Mac.

That admin password is used for all things related to the running of your Mac including Terminal.

Your Apple Password relates to strictly Apple ID matters such as iCloud, iTunes purchases, syncing apps via iCloud etc.

It should have nothing whatever to do with Terminal.

Because Terminal does not show your password when you type it - for security reasons - you shouldn’t assume that a failure is due to that. It is much more likely that the input code is incorrect. I’d check that first and stick with your admin password.

Ian

Admin pasword is what I m confused about. I think Admin password is what you sign in when restart Mac. OS X password is like installing apps. right?? Now with Terminal I did bot and failed...

 

[Dittoman1]

Ron:

I just tried it with using the Terminal and it works okay for me. I just typed in my admin password when it asked for it. The password of course is hidden from view, but it works just the same. I don't know what you're doing wrong?

Are you sure you're using your Admin password? That would be the same password used for installing apps and making changes.

Really, **** I did exactly follow suggestion with space for every words. Did u use space? Can u use screen shot of what you type then enter but not password so I can look at it

 

[Dittoman1]

 

[Dittoman1]

View attachment 32309 View attachment 32310

I did both the one at top is without PW but see if I type in right??

Second I put in password and does that means its done??

 

[Raz0rEdge]

Ron, you entered your password correctly and the commands you were executing did their job. They do NOT provide any feedback, that might be what's confusing you.

When you enter the incorrect password, you get the following:

$ sudo foo
Password:
Sorry, try again.
Password:
Sorry, try again.
Password:
sudo: 3 incorrect password attempts

I just hit ENTER each time without entering anything.

The "killall -HUP" command restarted the mDNSResponder service, you can confirm that by doing the following command

ps -eaf | grep DNSResponder

The output on my machine is:

65 268 1 0 Wed09PM ?? 0:26.55 /usr/sbin/mDNSResponder
0 272 1 0 Wed09PM ?? 0:02.01 /usr/sbin/mDNSResponderHelper

The bolded section indicates when the process started, in this case on Wednesday (8/26) at 9PM which makes sense since that's when the machine booted up after upgraded to the latest version of Catalina.

In your case, it should just have the time of when you ran the command, so something like 3:45PM