looks for IPs at the beginning of the line or prefixed by a space

Renames all files in the following format xxxxxx - 34. yyyyy.mp4 to the following format xxxxxx S1E34 - yyyyy.mp4

Piping a repeated character through the command will result in a single character only if there are more than 4 of them e.g. echo "aaaaaa bbbbb cccc ddd" | sed -ru 's/(.)\1{4,}/\1/g' the output will be "a b cccc ddd" Show Sample Output

You can use \n in your inserted data to insert multiple lines. The leading number is the position in the file where you want the insert, so in this case a '1' indicates the top of the file.

for redhat systems works sometimes :S tested on dell poweredge r7+ systems

In a multiple PostgreSQL server environment knowing the servers version can be important. Note that psql --version returns just the local psql apps version which may not be what you want. This command dumps the PostgreSQL servers version out to one line. You may need to add more command line options to the psql command for your connection environment. Show Sample Output

Filter out lines of input that contain 72, or fewer, characters. "sed -n" : don't print lines by default "/^.\{73,\}/" : find lines that start with 73 (or more) characters "p" : print them Show Sample Output

The sed script ensures that the "random" MAC address is unicast (bit 0 of first byte == 0) and local (bit 1 of first byte == 1)

If we've many files containing (?, ?, ?, ?, ? ) characters instead of ?, ?,... etc,... we can ue this simple command line running a sed command inside a for loop searching for files containing that characters. Hope u like it! Enjoy! ;) Show Sample Output

Convert all .weblock files (Apple url) to a url on the stdout.

Works even with spaces in filenames. As an alias in .gitconfig: [alias] editchanged = "!git status --porcelain | sed -ne 's/^ M //p' | tr '\\n' '\\0' | tr -d '\"' | xargs -0 vim"

Search, find and list aliases that match a regexp. # basic search example: alls c.* # loose search example: alls .*sudo.* # remember to double escape special characters; example: alls .*\\/.*

Regular expression search pattern to remove the Datetime and Name when you paste from skype chat into your text editor From this Gist: https://gist.github.com/webstandardcss/3967760857d6be470dda

Quickly reboot directly to Windows (or any other operating system) without the need to enter BIOS/UEFI or boot loader (if any). It's valid for one boot only, no persistent changes to boot priorities.

Something I do a lot is extract columns from some input where cut is not suitable because the columns are separated by not a single character but multiple spaces or tabs. So I often do things like: ... | awk '{print $7, $8}' ... which is a lot of typing, additionally slowed down when typing symbols like '{}$ ... Using the simple one-line function above makes it easier and faster: ... | col 7 8 How it works: The one-liner defines a new function with name col The function will execute awk, and it expects standard input (coming from a pipe or input redirection) The function arguments are processed with sed to use them with awk: replace all spaces with ,$ so that for example 1 2 3 becomes 1,$2,$3, which is inserted into the awk command to become the well formatted shell command: awk '{print $1,$2,$3}' Allows negative indexes to extract columns relative to the end of the line. Credit: http://www.bashoneliners.com/oneliners/oneliner/144/ Show Sample Output

When you run a lot of containers the built in docker ps output becomes unreadable. This command formats the output to be easier on the eyes. Requires q (https://github.com/harelba/q) text as data. Show Sample Output

Mac OSX friendly version of google function Show Sample Output

Using the $PIPESTATUS array you can get the results of a command in a sequence of commands piped together. The command above returns the result of grep -o "bob", which is exit result of 1 since no match was made. Show Sample Output

Not better, but more lightweight (sed instead of perl). Above command is reduced due to length restriction of less than 256 characters and entity encoding of "Save" command on this page. This is complete command (best without entity encoding): echo -e '\x2Helo folks\t!\r' | sed "y/\x0\x1\x2\x3\x4\x5\x6\x7\x8\x9\xA\xB\xC\xD\xE\xF\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1A\x1B\x1C\x1D\x1E\x1F\x20/␀␁␂␃␄␅␆␇␈␉␊␋␌␍␎␏␐␑␒␓␔␕␖␗␘␙␚␛␜␝␞␟␠/" ␂Helo␠folks␉!␍ Show Sample Output

btrfs checksum errors console report. Show Sample Output