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Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.
Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):
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[Update! Thanks to a tip from ioggstream, I've fixed both of the bugs mentioned below.]
You, yes, 𝙔𝙊𝙐, can be the terror of the Internet! Why use normal, boring bullet points in your text, when you could use a ROTATED HEAVY BLACK HEART BULLET (❥)!? (Which would also be an awesome band name, by the way).
This script makes it easy to find unusual characters from the command line. You can then cut and paste them or, if you're using a GTK application, type Control+Shift+U followed by the code point number (e.g., 2765) and then a SPACE.
USAGE: Put this script in a file (I called mine "ugrep") and make it executable. Run it from the command line like so,
The output will look like this,
☙ U+2619 REVERSED ROTATED FLORAL HEART BULLET
♡ U+2661 WHITE HEART SUIT
♥ U+2665 BLACK HEART SUIT
❣ U+2763 HEAVY HEART EXCLAMATION MARK ORNAMENT
❤ U+2764 HEAVY BLACK HEART
❥ U+2765 ROTATED HEAVY BLACK HEART BULLET
❦ U+2766 FLORAL HEART
❧ U+2767 ROTATED FLORAL HEART BULLET
⺖ U+2E96 CJK RADICAL HEART ONE
⺗ U+2E97 CJK RADICAL HEART TWO
⼼ U+2F3C KANGXI RADICAL HEART
You can, of course, use regular expressions. For example, if you are looking for the "pi" symbol, you could do this:
REQUIREMENTS: Although this is written in Bash, it assumes you have Perl installed because it greps through the Perl Unicode character name module (/usr/lib/perl5/Unicode/CharName.pm). Note that it would not have made more sense to write this in Perl, since the CharName.pm module doesn't actually include a subroutine for looking up a character based on the description. (Weird.)
BUGS: In order to fit this script in the commandlinefu limits, a couple bugs were added. ① Astral characters beyond the BMP (basic multilingual plane) are not displayed correctly, but see below. ② Perl code from the perl module being grepped is sometimes extraneously matched.
MISFEATURES: Bash's printf cannot, given a Unicode codepoint, print the resulting character to the terminal. GNU's coreutils printf (usually "/usr/bin/printf") can do so, but it is brokenly pedantic about how many hexadecimal digits follow the escape sequence and will actually die with an error if you give the wrong number. This is especially annoying since Unicode code points are usually variable length with implied leading zeros. The CharNames.pm file represents BMP characters as 4 hexits, but astral characters as 5. In the actual version of this script that I use, I've kludged around this misfeature by zero-padding to 8 hexits like so,
/usr/bin/printf "\U$(printf "%08x" 0x$hex)"
TIP 1: The author recommends "xsel" for command line cut-and-paste. For example,
ugrep biohazard | xsel
TIP 2: In Emacs, instead of running this command in a subshell, you can type Unicode code points directly by pressing Control-Q first, but you'll likely want to change the default input from octal to hexadecimal. (setq read-quoted-char-radix 16).
TIP 3: Of course, if you're using X, and you want to type one of the more common unusual characters, it's easiest of all to do it with your Compose (aka Multi) key. For example, hitting [Compose] <3 types ♥.
Alias to produce a list of all subdir sizes in current dir, in reverse order and human readable units. du is executed only once. Remove the slash after the asterisk to include files.
Apply to almost linux distroes.
Returns any file in the folder which would be rejected by Gmail, if you were to send zipped version.
(Yes, you could just zip it and knock the extension off and put it back on the other side, but for some people this just isn't a solution)
Get the IP of a hostname.
Just a few minor changes.
First the usage of lynx instead of curl so no sed is needed to revert the spaces. Then the usages of egrep instead of grep -e to save a few characters and last the removal of the extra 0.
Useful for grepping an IP range from the maillog. When for instance dealing with a spam-run from a specific IP range, or when errors occur from or to a specific IP-range.
In the example above the IP range 18.104.22.168/10 (22.214.171.124 - 126.96.36.199)
To grep the IP range 188.8.131.52/19 (184.108.40.206 - 220.127.116.11) from the maillog:
egrep '124\.217\.2(2[4-9]|[0-9]|5[0-5])' -J /var/log/maillog*
NOTE: the location of the maillog may vary based upon operating system and distribution.
Just an alternative :)
Somtime one wants to kill process not by name of executable, but by a parameter name. In such cases killall is not suitable method.
searches through the linux dictionary for the word you're trying to spell (you can use regular expressions, e.g. "< /usr/share/dict/words egrep bro[c]+o[l]+i" )
Really, you deserve whatever happens if you have a whitespace character in a file name, but this has a small safety net. The truly paranoid will use '-i'.
I have this as a file called deletekey in my ~/bin.
Makes life a little easier.
Quicker way to search man pages of command for key word
This should do the same thing and is about 70 chars shorter.
Requires aria2c but could just as easily wget or anything else.
A great way to build up a nice font collection for Gimp without having to waste a lot of time. :-)
If you have lots of subversion working copies in one directory and want to see in which repositories they are stored, this will do the trick. Can be convenient if you need to move to a new subversion server.
This shows you which files are most in need of commenting (one line of output per file)
I created this command to give me a quick overview of how many file types a directory, and all its subdirectories, contains. It works based off file extension, rather than file(1)'s magic output, because it ended up being more accurate and less confusing.
Files that don't have an ext (README) are generally not important for me to want to count, but you're free to customize this fit your needs.