Commands by Buzzcp

Commands by Buzzcp (4)

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Use a variable in a find command. Useful in scripting.

You define your variable MYVAR with the desired search pattern: MYVAR= ...which can then be searched with the find command. This is useful if you in a script, where you want the arguments to be fed into the find command. The provided search is case insensitive (-iname) and will find all files and directories with the pattern MYVAR (not exact matches). This may go without saying, but if you want exact matches remove the \* and if you want case sensitive, use the -name argument.
This is sample output - yours may be different.
0

find . -iname \*${MYVAR}\* -print

Buzzcp · 2010-08-04 05:43:51 3
Edit video by cutting the part you like without transcoding.

Examples: The following will take frames starting at 15.2 seconds for a total of 45.9 seconds: mencoder -ss 15.2 -endpos 30.7 -oac copy -ovc copy mymovie.avi -o myeditedmovie.avi Keep in mind -endpos is the total time, i.e. the output video in this is 3 minutes 3 seconds in length: mencoder -ss 1 minute -endpos 2 minutes 3 seconds -oac copy -ovc copy mymovie.avi -o myeditedmovie.avi
This is sample output - yours may be different.
8

mencoder -ss <start point> -endpos <time from start point> -oac copy -ovc copy <invid> -o <outvid>

Buzzcp · 2010-01-11 22:59:13 1
Date shows dates at other times/dates

Use date to find the date at other days and times.
This is sample output - yours may be different.
5

date -d '2 weeks ago'

Buzzcp · 2009-04-28 03:09:23 11
Monitor dynamic changes in the dmesg log.

Other logs can be monitored similarly, e.g. watch "tail -15 /var/log/daemon.log"
This is sample output - yours may be different.
11

watch "dmesg |tail -15"

Buzzcp · 2009-04-14 03:13:17 6

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Execute MySQL query send results from stdout to CSV

You can, of course, tell MySQL to output results to a file and dictate how to terminate lines, etc. But sometimes you don't have access to the file system MySQL is running on, complicating outputting your results to a CSV, necessitating either annoying hacks or this simple command :D

check open ports without netstat or lsof

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 just the executable files (or directories) in current directory

Does an 'ls' on just the files and directories in the current directory with an execute bit turned on. This version will list directories. Just tack on "-type f" to the start of the find to omit listing directories and list only files.

Recursively change permissions on files, leave directories alone.

Show a prettified list of nearby wireless APs

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"

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

move contents of the current directory to the parent directory, then remove current directory.

I think this is less resource consuming than the previous examples

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.

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