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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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search the newest *.jpg in the directory an make a copy to newest.jpg. Just change the extension to search other files. This is usefull eg. if your webcam saves all pictures in a folder and you like the put the last one on your homepage. This works even in a directory with 10000 pictures.
Works in Ubuntu, I hope it will work on all Linux machines. For Unixes, tail should be capable of handling more than one file with '-f' option.
This command line simply take log files which are text files, and not ending with a number, and it will continuously monitor those files.
Putting one alias in .profile will be more useful.
ok I'm sure it's not pretty
Tuned for short command line - you can set the path to sessionstore.js more reliable instead of use asterixes etc.
Usable when you are not at home and really need to get your actual opened tabs on your home computer (via SSH). I am using it from my work if I forgot to bookmark some new interesting webpage, which I have visited at home. Also other way to list tabs when your firefox has crashed (restoring of tabs doesn't work always).
This script includes also tabs which has been closed short time before.
It's like `prstat -t` under Solaris
Declare this function in your Shell, then use it like this:
> jumpTo foo
The script will search for the 'foo' pattern in your current xmms2 playlist (artist or songname), and play the first occurence of it !
This command will show the 20 processes using the most CPU time (hungriest at the bottom).
You can see the 20 most memory intensive processes (hungriest at the bottom) by running:
ps aux | sort +3n | tail -20
Or, run both:
echo "CPU:" && ps aux | sort +2n | tail -20 && echo "Memory:" && ps aux | sort +3n | tail -20
This command will tell you the 20 biggest directories starting from your working directory and skips directories on other filesystems. Useful for resolving disk space issues.
See man vmstat for information about the statistics.
This does the same thing without the timestamp:
This truncates any lines longer than 80 characters. Also useful for looking at different parts of the line, e.g. cut -b 50-100 shows columns 50 through 100.
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).
This command is much quicker than the alternative of "sort | uniq -c | sort -n".
with discard wilcards in bash you can "tail" newer logs files to see what happen, any error, info, warn...
The pipe to head removes the listing of . as the largest directory.
In this case, I'm keeping an eye on /var/log/messages, but of course any file will do. When I'm following a file, I generally don't want to see anything other than what has been added due to the command or service I've executed. This keeps everything clean and tidy for troubleshooting.
Useful to e.g. keep an eye on several logfiles.
It displays, last 15 yum operations (in last operation as first row order) with its dates. Change 15 to any number of operations you need to display or remove "| tac" to see it in reverse order (last operation as last row)
The hyphen tells vim to open from STDOUT - saves having to create temporary files.
tail would be considered dull, but pair this with being able to push out unix commands over ARD, and life gets easier. (Same can be said for my TimeMachine scrape command, http://xrl.us/begrzb)
While they are few config options and even fewer useful details regarding what actually is being sent by the time machine 'backupd' process, this can at least tell you its doing something, how much it's doing, and exactly how often. Via macosxhints, http://xrl.us/begrwa, which in turn was via comments
If you have this command in your history, you can always re-run it and have it reference the latest file.
The glob matches all timestamped files and then the resulting array is sorted by modification time (m) and then the first element in the sorted array is chosen (the latest)
List top 20 IP from which TCP connection is in SYN_RECV state.
Useful on web servers to detect a syn flood attack.
Replace SYN_ with ESTA to find established connections