You can look up the name servers associated with a domain name using either “whois” or “dig NS”. In some rare occasions, I have gotten back two different answers using these two techniques. In my experience, “dig NS” is the more trustworthy of the two.
command line
Generate SSH Key Pair
Using SSH keys allows greater security than a password when remoting into a machine, using SFTP, or WP CLI on a remote machine – however, they do require more work to setup. For security reasons, I generate a new key pair for each site I work on. To generate a new key pair I do the following.
Activity Monitor find App behind Process Name
When working on my Mac, sometimes I find a process in Activity Monitor and I want to know what application the process belongs to. I was introduced to this command to do just that.
License for my Open Source Software
These are my reminder notes on how to quickly populate the LICENSE information for one of my projects from the command line.
Git Target Commit by Message
There are lots of ways to target a git commit and one way that I often forget to use (but really like it when I remember) is targeting a specific git commit by the commit message.
Checksum on Mac OS X Command Line
The checksum is like a fingerprint for the file. A file is processed through a known algorithm which results in the checksum, a.k.a “hash”, which is a string of letters and numbers unique to that file, e.g. 8ab686eafeb1f44702738c8b0f24f2567c36da6d. If the file is modified, the resulting checksum will be different. This allows a quick way to […]
Command Line Delete All Directories Except One
On the Mac OS X bash command line, you can delete all directories, with the exception of one, in the following way. If our current directory has sub-directories and we want to delete all of them except, ./really-important-do-not-delete, we can run $ shopt -s extglob $ rm -rf !(really-important-do-not-delete) $ ls really-important-do-not-delete $ original source
Command Line Find
Since I’m always forgetting the format for the command line “find” command, I’ve made a note of it here.
MySQL Paging Lots of Results
I’ve recently moved to using the terminal program alacritty, which does not natively do paging. This is not generally a problem since I can pipe results to less. $ ls dir-w-lots-of-files | less However, I found myself working in command line MySQL and I got LOTS of results but could not page back. It turns […]
When command line “which” gives the wrong result
There is a very useful command line tool called which. This tool determines which file will be executed when you type it. Unfortunately, this command can sometimes provide the wrong answer. Newest Update: I was using bash as my terminal shell when I wrote this article. Now, I’m using zsh and with this shell the […]