macos - What is the Unix command to create a hardlink to a directory in OS X?

macos - What is the Unix command to create a hardlink to a directory in OS X?

How do you create a hardlink(as opposed to a symlink or a Mac OS alias) in OS X that points to a directory? I already know the command "ln target destination" but that only works when the target is a…


How do I change read/write mode for a file using Emacs?

If a file is set to read only mode, how do I change it to write mode and vice versa from within Emacs?…


git-upload-pack: command not found, when cloning remote Git repo

I have been using git to keep two copies of my project in sync, one is my local box, the other the test server. This is an issue which occurs when I log onto our remote development server using ssh; g…


SQL Server Hash Indexes

When using the CHECKSUM column type to artificially create a hash index, is the lookup actually O(1) or is it still O(lg n) like it is for a clustered index? I have a table from which I will select b…


What security benefits are provided by using stored procedures to access data?

I have seen some guidance which recommends that you secure a database by layering all data access through stored procedures. I know that for SQL Server, you can secure tables, and even columns agains…



How to fix error caused by libmysqlclient.15.dylib not being loaded?

I've upgraded to Rails 2.2.2 and installed the MySQL 2.7 gem and am seeing this error when I try to run a migration or start the server: dlopen(/Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle,…


SQL Server: Database stuck in “Restoring” state

I backed up a database: BACKUP DATABASE MyDatabase TO DISK='MyDatabase.bak' WITH INIT--overwrite existing And then tried to restore it: RESTORE DATABASE MyDatabase FROM DISK='MyDatabase.bak'…


non routable ip address

I know that 127.0.0.1 is by convention loopback and that there are various address ranges which are reserved for local use. Is there an IP address that is reserved never to be assigned. I would like…


rsync error: failed to set times on “/foo/bar”: Operation not permitted

I'm getting a confusing error from rsync and the initial things I'm finding from web searches(as well as all the usual chmod'ing) are not solving it: rsync: failed to set times on "/foo/bar": Operati…


'receive-pack': service not enabled for './.git'

(Solved already, I'm writing this for the next guy) I was running git daemon on one computer and tried synchronizing with another. On computer A, I ran: git daemon--reuseaddr--base-path=.--export-a…




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