Commands by Mozai (12)

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Check SSH public and private keys matching
Tested in bash4

Install pip with Proxy
Installs pip packages defining a proxy

Break lines after, for example 78 characters, but don't break within a word/string
Per default, linux/unix shells are configured with a width of 80 characters. If you like to edit a phrase or string on a line with more than 80 characters it might take long to go there (for example a line with 1000 characters and you like to edit the 98th word which is character 598-603). Maybe you might wish to use 78 characters, because if you forward the text via mail and the text will be quoted (2 extra characters at the beginning to the line "> "), you use 80 characters, otherwise 82, which are lame.

remove the last of all html files in a directory
sed can be used deleting the last line and with -i option, there's no need to for temp files, the change is made on the actual file

Using awk to sum/count a column of numbers.
Takes a input file (count.txt) that looks like: 1 2 3 4 5 It will add/sum the first column of numbers.

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)
Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Join the content of a bash array with commas
This type of join is clearly documented in the bash manual. Only the first character of IFS is used for the delimiter.

Show highlighted text with full terminal width
Show a full terminal line inverted with custom text.

Remove BOM (Byte Order Mark) from text file
Takes file (text.txt), removes BOM from it, and outputs the result to a new file (newFile.txt). BOM is "Byte Order Mark" ([http://en.wikipedia.org/wiki/Byte_order_mark]), an invisible, non-breaking, zero-length character. In other words, if you see a DIFF with "" at the beginning, you've got a byte order mark, which can't be removed without this command or a hex editor. It can appear for a number of reasons, such as getting copied to/from a UNIX filesystem...


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