du -sh FOLDER_NAME

Listing ip addresses stored within the table

• iptables -L -n
• iptables -L -n –line-numbers

Insert IP Address

I = Insert

1 = position

• iptables -I FTP 1 -s ***.***.***.*** -j ACCEPT

Delete IP Address

-D = delete

1 = position in the table

• iptables -D FTP 1

This is ideal when using the command line on a regular basis. One example is that I do a great deal of development on my local machine so when I eventually come to connect to the remote server I have to keep typing the ssh command out.

By typeing history on the command line you get a numbered list of all the commands. Now this on its own isn’t really useful but when coupled with the following becomes extremely useful.

If you now type !number and press enter this will execute the command. (Number is the number of the item from the returned list)

Better still if you do the following… !number:p this prints the command to the list so you can then edit the command if some parameters need to be changed.

It gets better… yu can filter the returned list by using the grep command. history | grep “search term”

Use the above command to print the required command to the command line and away you go.

In the past it has only been a few files, no more than 50 or so which didn’t pose a great problem but today I have uncompressed a file with over 4000 files in it… and yes they were all duplicated. This makes a mess of the files structure.

I decided to research the issue and find away of preventing this from happening. I came across this post on Jim Plush’s blog.

By using the following command when decompressing will prevent the dot underscore files being added to the Linux box.

tar -zxpvf mytarfile.tgz ––exclude=”._*.*”

Let me know if anyone finds something else or has any issues / success with this.

EDIT,

Aside from the above, which seems to be failing and the issue has not gone away with prayer so I have been on the case this morning and have found a working solution.

tar zxpf test.tar ––exclude ._*

It seems that missing the speech marks from the file name and removing the equals has done the trick.

My trash can had 19k items in it (been a while…) and wasn’t sure I wanted to just empty the trash en-masse so to speak but just clear out groups of files, like all the zips and rars, all gifs etc

By using the following terminal command I was able to clear out files by extension.

find /Users/USER_NAME/.Trash/ -name "*.zip" -delete

Firstly you will need to have the image you want to use and note the name of it (name-of-image.jpg)

Note that changing the default logon image has to be done using terminal as the files are locked in to the root user, unless of course you are logged in to the Mac using the root login.

So open Terminal from the Applications/Utilities folder and you are ready to go.

If you want to keep the old image then it needs to be renamed so enter the following line in to the terminal window

sudo mv /System/Library/CoreServices/DefaultDesktop.jpg /System/Library/CoreServices/DefaultDesktop.jpg.old

You will be asked for the password so just enter it and press enter.

sudo cp /path/to/image name-of-image.jpg /System/Library/CoreServices/DefaultDesktop.jpg

WEnter your password again and then the next time you log in the new screen will be there.

Alternatively there is little app that can do this if you are not to sure about using Terminal.

Head over to loginox and see if this is for you

find /path/to/folder/ -type f -print0 | xargs -0 grep -l “TEXT YOU WANT TO FIND”

let me know if this is useful or can be improved.

1 – defaults write “Apple Global Domain” AppleScrollBarVariant DoubleBoth

Puts double scroll arrows at both ends of scroll bar. Use Appearance pane in system preferences to reset.

2 – defaults write com.apple.finder AppleShowAllFiles TRUE

Shows hidden files in the finder. Replace TRUE with FALSE to hide hidden files again

More to follow…