This will calculate the your commandlinefu votes (upvotes - downvotes). Hopefully this will boost my commandlinefu points. Show Sample Output
Converts the first letter of each word to upper case Show Sample Output
Joins each line that end with backslash (common way to mark line continuation in many languages) with the following one while removing the backslash. Show Sample Output
I found this command on a different site and thought you guy might enjoy it. Just change "YOURSEARCH" to what ever you want to search. Example, "Linux Commands"
This command converts a MySQL query directly into a .csv (Comma Seperated Value)-file. Show Sample Output
Suppose you made a backup of your hard disk with dd: dd if=/dev/sda of=/mnt/disk/backup.img This command enables you to mount a partition from inside this image, so you can access your files directly. Substitute PARTITION=1 with the number of the partition you want to mount (returned from sfdisk -d yourfile.img). Show Sample Output
Searches the /var/log/secure log file for Failed and/or invalid user log in attempts. Show Sample Output
Having to escape forwardslashes when using sed can be a pain. However, it's possible to instead of using / as the separator to use : .
I found this by trying to substitute $PWD into my pattern, like so
sed "s/~.*/$PWD/" file.txt
Of course, $PWD will expand to a character string that begins with a / , which will make sed spit out an error such as "sed: -e expression #1, char 8: unknown option to `s'".
So simply changing it to
sed "s:~.*:$PWD:" file.txt
did the trick.
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Connect to a machine running ssh using mac address by using the "arp" command Show Sample Output
this string of commands will release your dhcp address, change your mac address, generate a new random hostname and then get a new dhcp lease.
I often need to extract a function from a bash script and this command will do it. Show Sample Output
This can show all ls colors, with a demo.
allow multiword translations Show Sample Output
deletes line 3 in known_hosts text file
Print all lines between two line numbers This command uses sed(1) to print all lines between two known line numbers in a file. Useful for seeing output in a log file, where the line numbers are known. The above command will print all lines between, and including, lines 3 and 6. Show Sample Output
Certain Flash video players (e.g. Youtube) write their video streams to disk in /tmp/ , but the files are unlinked. i.e. the player creates the file and then immediately deletes the filename (unlinking files in this way makes it hard to find them, and/or ensures their cleanup if the browser or plugin should crash etc.) But as long as the flash plugin's process runs, a file descriptor remains in its /proc/ hierarchy, from which we (and the player) still have access to the file. The method above worked nicely for me when I had 50 tabs open with Youtube videos and didn't want to have to re-download them all with some tool.
Remove ( color / special / escape / ANSI ) codes, from text, with sed Credit to the original folks who I've copied this command from. The diff here is: Theirs: [m|K] Theirs is supposed to remove \E[NUMBERS;NUMBERS[m OR K] This statement is incorrect in 2 ways. 1. The letters m and K are two of more than 20+ possible letters that can end these sequences. 2. Inside []'s , OR is already assumed, so they are also looking for sequences ending with | which is not correct. This : [a-zA-Z] This resolves the "OR" issue noted above, and takes care of all sequences, as they all end with a lower or upper cased letter. This ensures 100% of any escape code 'mess' is removed. Show Sample Output
Shell function which takes a bash command as its input, and displays the following formatted output: EXAMPLE: command OUTPUT: output from command Show Sample Output
If you have a file full of numbers written line by line, you can sum every line to get the total. With a file like this: 3443535 9878977 67554 987798 232324 you will got: 14610188
bash.org is a collection of funny quotes from IRC.
WARNING: some of the quotes contain "adult" jokes... may be embarrassing if your boss sees them...
Thanks to Chen for the idea and initial version!
This script downloads a page with random quotes, filters the html to retrieve just one liners quotes and outputs the first one.
Just barely under the required 255 chars :)
Improvment:
You can replace the head -1 at the end by:
awk 'length($0)>0 {printf( $0 "\n%%\n" )}' > bash_quotes.txt
which will separate the quotes with a "%" and place it in the file.
and then:
strfile bash_quotes.txt
which will make the file ready for the fortune command
and then you can:
fortune bash_quotes.txt
which will give you a random quote from those in the downloaded file.
I download a file periodically and then use the fortune in .bashrc so I see a funny quote every time I open a terminal.
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will purge: only installed apps: /^ii/!d avoiding current kernel stuff: /'"$(uname -r | sed "s/\(.*\)-\([^0-9]\+\)/\1/")"'/d using app names: s/^[^ ]* [^ ]* \([^ ]*\).*/\1/ avoiding stuff without a version number: /[0-9]/!d
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