Commands by peter4512

Commands by peter4512 (7)

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This uses spotlight indices to find files that have recently been added. Other options include underscore separated versions of: this week, this month, this year; today, yesterday. Show Sample Output

mdfind 'kMDItemFSCreationDate >= $time.this_month'

peter4512 · 2012-11-13 12:50:51 4

Automatically find and re-attach to a detached screen session

I alias this as "tach": alias tach='screen -x `screen -ls | grep Detached | cut -c -10`' If you have several detached sessions it will just grab the first one. If you're running nested screens you can open new outer windows and run tach repeatedly to grab all the detached sessions into that one. Show Sample Output
This is sample output - yours may be different.
```
<sample output doesn't make sense--screen session gets re-attached>
```
-3

screen -x `screen -ls | grep Detached | cut -c -10`

peter4512 · 2012-03-01 14:13:09 7
List detached screen sessions

If you have many screen sessions, it can be difficult to find the id of the one you just detached from so you can re-attach using `screen -x -S ` Show Sample Output
This is sample output - yours may be different.
```
$ screen -ls | grep D
	16017.tiny	(Detached)
	22797.super	(Detached)
```
-1

screen -ls | grep D

peter4512 · 2012-03-01 14:05:40 4
tell if a port is in use

if you don't do --numeric-ports, netstat will try to resolve them to names Show Sample Output
This is sample output - yours may be different.
```
tcp        0      0 localhost.localdomain:8321  *:*                         LISTEN
tcp        0      0 ::1:8321                    *:*                         LISTEN
```
1

netstat -a --numeric-ports | grep 8321

peter4512 · 2012-01-20 22:00:56 6
colorize and continuously tail two files

(follow with next command) tail -f from.log | colorize.pl +l20:".*" & Use with http://www.commandlinefu.com/commands/view/10031/intercept-monitor-and-manipulate-a-tcp-connection. - can use to view output of tees that send traffic to files - output will be interwoven with red for sent traffic and green for received. get colorize.pl from http://www.flinkmann.de/71-1-Colorizepl.html
This is sample output - yours may be different.
-4

tail -f to.log | colorize.pl +l10:".*" &

peter4512 · 2012-01-20 21:46:47 6
Simple find

Just search the root of the file hierarchy for matches for a text string. Send errors to a file rather than stdout.
This is sample output - yours may be different.
0

find / -name '*android*' 2>errors.txt

peter4512 · 2012-01-11 15:16:58 6
Intercept, monitor and manipulate a TCP connection.

This will handle multiple incoming connections. Also, found sed works best with -u flag (unbuffered io). Easiest way I've found to get ncat is to install nmap.
This is sample output - yours may be different.
1

ncat -l -p 1234 --sh-exec "tee -a to.log | nc machine port | tee -a from.log"

peter4512 · 2012-01-11 15:14:17 4

What's this?

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convert unixtime to human-readable

Mac have direct conversion of seconds (Epoch time)

Lists the supported memory types and how much your board can support.

continuously print string as if being entered from the keyboard

Cycles continuously through a string printing each character with a random delay less than 1 second. First parameter is min, 2nd is max. Example: 1 3 means sleep random .1 to .3. Experiment with different values. The 3rd parameter is the string. The sleep will help with battery life/power consumption. $ cycle 1 3 $(openssl rand 100 | xxd -p) Fans of "The Shining" might get a kick out of this: $ cycle 1 4 ' All work and no play makes Jack a dull boy.'

Printout a list of field numbers (awk index) from a CSV file with headers as first line.

Useful to identify the field number in big CSV files with large number of fields. The index is the reference to use in processing with commands like 'cut' or 'awk' involved.

Automator Bash script to create Clean zips in MacOS Finder without __MACOSX metadata

Finder compresses to ZIP but always includes extraneous metadata files (__MACOSX and .DS_Store) files and folders that may confuse other programs. One alternative is creating them and then editing the ZIP. This can work standalone or in an automator script accepting multiple selections (files or folders) and creating one zip per argument/selected file without that metada.

Create a git alias that will pull and fast-forward the current branch if there are no conflicts

This command will first add an alias known only to git, which will allow you to pull a remote and first-forward the current branch. However, if the remote/branch and your branch have diverged, it will stop before actually trying to merge the two, so you can back out the changes. http://www.kernel.org/pub/software/scm/git/docs/git-pull.html Tested on git 1.5.6.1, msysgit (Windows port) Actually this is not really the way I want it. I want it to attempt a fast-foward, but not attempt to merge or change my working copy. Unfortunately git pull doesn't have that functionality (yet?).

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Get your external IP address

Get AWS temporary credentials ready to export based on a MFA virtual appliance

Flush and then immediately start watching a file

This is useful for keeping an eye on an error log while developing. The !^ pulls the first arg from the previous command (which needs to be run in a sub-shell for this shortcut to work).

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