1. V.m.k. Osx For Macbook

Sed 's/ b (0-9 ) b/0 1/g' versions.txt sort sed 's/ b0 (0-9 )/ 1/g' To explain why this works, consider the first sed command by itself. With your input as versions.txt, the first sed command adds a leading zero onto single-digit version numbers, producing: 06.03.01.01 06.03.01.02 06.03.01.03 06.03.01.10 06.03.01.11 The above can be sorted normally. After that, it is a matter of removing the added characters. In the full command, the last sed command removes the leading zeros to produce the final output: 6.3.1.1 6.3.1.2 6.3.1.3 6.3.1.10 6.3.1.11 The works as long as version numbers are 99 or less. If you have version numbers over 99 but less than 1000, the command gets only slightly more complicated: sed 's/ b (0-9 ) b/00 1/g; s/ b (0-90-9 ) b/0 1/g' versions.txt sort sed 's/ b0 + (0-9 )/ 1/g' As I don't have a Mac, the above were tested on Linux. UPDATE: In the comments, Jonathan Leffler says that even though word boundary ( b) is in Mac regex docs, Mac sed doesn't seem to recognize it.

He suggests replacing the first sed with: sed 's/^0-9./0&/; s/. (0-9 )$/.0 1/; s/. (0-9 )./.0 1./g; s/. (0-9 )./.0 1./g' So, the full command might be: sed 's/^0-9./0&/; s/.

The most current version of OS X is OS X 10.9 Mavericks. OS X Mavericks is available as a free download from the Mac App Store. If you need to purchase Mac OS X 10.6 Snow Leopard you may order it from this page. Video tutorial showing how to download, setup, and install a free unlimited lifetime VPN for MacOS, Mac OS X High Sierra, El Capitan, Yosemite, Mavericks, and earlier versions of Mac.

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(0-9 )$/.0 1/; s/. (0-9 )./.0 1./g; s/. (0-9 )./.0 1./g' versions.txt sort sed 's/^0//; s/.0/./g' This handles version numbers up to 99. Since the code needs to work on Linux as well as on Mac, the test on Linux was valid. You seem to be using the b (word boundary) option to sed.

Unfortunately, although b' is mentioned in man 7 reformat on Mac OS X 10.9.1, the sed does not seem to recognize it, with or without the -E option. 'Tis a nuisance! You'll probably have to use sed 's/^0-9./0&/; s/.

(0-9 )$/.0 1/; s/. (0-9 )./.0 1./g; s/. (0-9 )./.0 1./g' instead. The repeated substitution is necessary.

– Jan 28 '14 at 2:00. You can use additional features of git tag to get a list of tags matching a pattern and sorted properly for version tag ordering (typically no leading zeros): $ git tag -sort v:refname v0.0.0 v0.0.1 v0.0.2 v0.0.3 v0.0.4 v0.0.5 v0.0.6 v0.0.7 v0.0.8 v0.0.9 v0.0.10 v0.0.11 v0.0.12 From: -sort= Sort in a specific order.

Supported type is 'refname (lexicographic order), 'version:refname' or 'v:refname' (tag names are treated as versions). Prepend '-' to reverse sort order. When this option is not given, the sort order defaults to the value configured for the tag.sort variable if it exists, or lexicographic order otherwise. See git config(1).

Mac OS X uses permissions to restrict access to applications, files, and folders. Utilizing this security control can help protect your data from unauthorized access. Whether you use your Mac in public places or share it with other users, you may want to change the permissions on your documents to ensure the confidentiality and integrity of your data.

Of course, it can be difficult to strike a balance between convenience and security when using permissions. Users who are too restricted won’t be able to perform basic tasks.

And if you give users too much power, you risk privilege escalation or worse. Use trial and error to find an adequate level of security that everyone can live with.

File Permissions Crash Course Every file and folder on your Mac has a configurable set of permissions. Permissions control three types of access: reading, writing, and executing. You can mix and match any of the types to grant seven levels of access, as illustrated below. Read, write, and execute permissions overlap to create seven octal permission notations.

You’ll learn how to modify permissions using the Info window in the next section. But to really leverage permissions, you need to learn the Unix-based symbolic and octal permission notations, which are hidden beneath the Mac OS X graphical user interface. All of the available permissions are shown in the table below. Permissions No permission Execute Write Write and execute Read Read and execute Read and write Read, write and execute Octal Notation 0 1 2 3 4 5 6 7 Symbolic notation - -x -w- -wx r- r-x rw- rwx The Terminal application allows you to use octal notation to set permissions for the owner, a group, and everyone else. To create a “write only” drop box folder, you could set directory permissions to 622 to give the owner read and write permissions, and the group and everyone else write only permissions. The three groups of notations are shown below. Symbolic and octal permission notations for owner, group, and everyone.

Mac OS X automatically sets permissions to limit a user’s access to system files and other user directories. If that protection isn’t good enough, you can change permissions to prevent other users from doing stuff like editing your 'Great American Novel,' reading private financial documents, or opening a specific application.

How to Modify Permissions with the Info Window The Info window allows you to modify permissions for users, groups, and everyone else. It doesn’t provide the same level of granular control as the chmod command, which you’ll learn about in the next section, but it’s a good way to quickly limit access to a file or folder.

V.m.k. Osx For Macbook

Here’s how to modify permissions with the Info window:. Click a file or folder to select it.

From the File menu, select Get Info. One of the windows shown below appears. Click the disclosure triangle next to Sharing & Permissions to display permissions for the selected file or folder. Click the lock and authenticate with an administrator account.

Use the menus next to users and groups to change the permissions. When you’re finished, close the Info window. Changes are effective immediately. How to Modify Permissions with chmod For total control over permissions, you can use two Unix commands - ls and chmod - to display permissions and modify them. Assume you want to find a folder’s current permissions and then change them to 755. This would give you as the owner read, write and execute permissions, and everyone else read and execute permissions. Here’s how to find a folder’s current permissions and change them:.

Open the Terminal application. Type ls –l, and then press Return. The symbolic permissions of the files and folders in your home directory are displayed, as shown below. Type chmod 755 foldername, and then press Return. This changes the permissions of the folder to rwxr-xr-x.

When it comes to using the ls and chmod commands, practice makes perfect. Try modifying the permissions on a couple of sample files. If you need more help, use the man command to display the manual pages for these commands (e.g., man ls). Final Thoughts Permissions as a security control are more effective in some environments than others. Schools and offices have a real need for permissions - there are lots of users, and the information stored on the computers can be valuable. In single-user households, where only one person uses a Mac, convenience might outweigh any perceived security threats.

It’s all about finding the right balance for your environment. Related Articles. Meet Your Macinstructor, the author of, has been a Mac user for over 20 years. A former ghost writer for some of Apple's most notable instructors, Cone founded Macinstruct in 1999, a site with OS X tutorials that boasts hundreds of thousands of unique visitors per month. You can email him at:.