Commands by evil (4)

  • Quickly CD Out Of Directories Without 5+ Aliases

    I wrote this a long time ago, wondering why this wasn't floating around somewhere out there (at least not where I could find).. this seems much more simple than multiple aliases and can cd out of directories easier. Show Sample Output


    9
    up() { local x='';for i in $(seq ${1:-1});do x="$x../"; done;cd $x; }
    evil · 2012-05-16 04:21:41 5
  • Create a false directory structure for testing your commands

    This will make a false directory with the same file names as whatever directory you choose. This is wise to use when testing scripts that alter contents, filenames, or move files. I wrote this after an OOPS I made when renaming a directory of JPGs, PNGs, PSDs that were mixed. I recommend this as I lost over 2000 vacation pictures and some graphics I designed for software and web sites. :( NOTE: This only creates name copies, that data itself is not copied.


    1
    for each in /usr/bin/*; do echo $each | sed 's/\/usr\/bin\///' | xargs touch; done
    evil · 2011-10-13 19:14:34 5
  • A way to run commands on a remote computer to be displayed on the remote computer

    This is a simple solution to running a remote program on a remote computer on the remote display through ssh. 1. Create an empty 'commander' file in the directory where you intend on running these commands. 2. Run the command 3. Hop on another computer and ssh in to the PC where you ran the command 4. cd to the directory where the 'commander' file is. 5. Test it by doing the following: echo "xeyes" > commander 6. If it worked properly, then xeyes will popup on the remote computer. Combined with my other one liner, you can place those in some start-up scripts and be able to screw with your wife/daughter/siblings, w/e by either launching programs or sending notifications(my other one liner). Also, creates a log file named comm_log in working directory that logs all commands ran.


    0
    while :;do if [ ! $(ls -l commander |cut -d ' ' -f5) -eq 0 ]; then echo "Ran command: $(less commander) @ $(date +%D) $(date +%r)" >> comm_log;"$(less commander)";> commander;fi;done
    evil · 2010-06-15 01:20:27 4
  • pop-up messages on a remote computer

    Run this command when you are physically at the computer you wish to send pop-up messages to. Then when you ssh in to it, you can do this: echo "guess who?" > commander guess who? will then pop up on the screen for a few moments, then disappear. You will need to create the commander file first. I mess with my wife all the time with this. i.e. echo "You have given the computer a virus. Computer will be rendered useless in 10 seconds." > commander lol


    2
    while : ; do if [ ! $(ls -l commander | cut -d ' ' -f5) -eq 0 ]; then notify-send "$(less commander)"; > commander; fi; done
    evil · 2010-06-13 18:45:02 13

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Look for English words in /dev/urandom
Little faster alternative.

ps with parent/child process tree
Shows a tree view of parent to child processes in the output of ps (linux). Similar output can be achieved with pstree (also linux) or ptree (Solaris).

Umount only the NFS related to 'string'
Sometimes, you have a lot of NFS in the server and you can't or shouldn't use umount -a. Whis this command, you only umount the fs related to the 'string'

Every Nth line position # (AWK)
A better way to show the file lines 3n + 1

Show interface/ip using awk
Interfaces like lo can be omitted from the beginning, there are probably better ways of doing this, i'm a noob at awk.

Install pip with Proxy
Installs pip packages defining a proxy

Convert entire audio library in parallel
Uses parallel processing Reiteration of my earlier command https://www.commandlinefu.com/commands/view/15246/convert-entire-music-library Usage lc Old_Directory New_DIrectory Old_Format New_Format lc ~/Music ~/Music_ogg mp3 ogg

copy timestamps of files from one location to another - useful when file contents are already synced but timestamps are wrong.
Sometimes when copying files from one place to another, the timestamps get lost. Maybe you forgot to add a flag to preserve timestamps in your copy command. You're sure the files are exactly the same in both locations, but the timestamps of the files in the new home are wrong and you need them to match the source. Using this command, you will get a shell script (/tmp/retime.sh) than you can move to the new location and just execute - it will change the timestamps on all the files and directories to their previous values. Make sure you're in the right directory when you launch it, otherwise all the touch commands will create new zero-length files with those names. Since find's output includes "." it will also change the timestamp of the current directory. Ideally rsync would be the way to handle this - since it only sends changes by default, there would be relatively little network traffic resulting. But rsync has to read the entire file contents on both sides to be sure no bytes have changed, potentially causing a huge amount of local disk I/O on each side. This could be a problem if your files are large. My approach avoids all the comparison I/O. I've seen comments that rsync with the "--size-only" and "--times" options should do this also, but it didn't seem to do what I wanted in my test. With my approach you can review/edit the output commands before running them, so you can tell exactly what will happen. The "tee" command both displays the output on the screen for your review, AND saves it to the file /tmp/retime.sh. Credit: got this idea from Stone's answer at http://serverfault.com/questions/344731/rsync-copying-over-timestamps-only?rq=1, and combined it into one line.

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"

list with full path

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