Commands by flarn2006

Commands by flarn2006 (5)

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Re-execute a command using a saved /proc/pid/cmdline file

Replace $CMDLINE_FILENAME with the name of the cmdline file you copied from /proc/pid, and $COMMAND with the command to execute with those arguments.
This is sample output - yours may be different.
0

tail -zn+2 $CMDLINE_FILENAME | xargs -0 $COMMAND

flarn2006 · 2020-06-23 05:31:45 4
Talk out of another computer's speakers

Exactly what the summary says. This command will connect to another computer via SSH, and stream audio from your computer's microphone to the other computer's speakers. Use it like an intercom.
This is sample output - yours may be different.
0

rec -t ogg - | ssh remote_hostname play -t ogg -

flarn2006 · 2016-10-07 07:29:53 0
See how many times you've typed 'ls' by itself

I seem to do this compulsively every time I change directories, sometimes even when I don't, even if I know exactly what I need to do. (Don't worry, the sample output is just an exaggeration. :) Show Sample Output
This is sample output - yours may be different.
```
23934729
```
0

grep -cx ls ~/.bash_history

flarn2006 · 2016-09-14 17:06:59 0
Display "ls -l" output with color in less
This is sample output - yours may be different.
0

ls -l --color | less -R

flarn2006 · 2016-05-07 17:19:56 0
Remove duplicate files from the current directory

Remove everything after the second "rev" to only display the duplicate filenames and their hashes.
This is sample output - yours may be different.
0

sha1sum * | sort | rev | uniq -df1 | rev | cut -d" " -f3 | xargs rm

flarn2006 · 2015-08-09 20:32:12 0

What's this?

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Use Dell Service Tag $1 to Find Machine Model [Model Name and Model Number]

255 Max Characters CommandLineFu for $dellurl='http://support.dell.com/support/topics/global.aspx/support/my_systems_info/en/details?c=us&cs=04&l=en&s=hied&ServiceTag='

Create the oauth token required for a Twitter stream feed

This is the THIRD in a set of five commands. See my other commands for the previous two. This step creates the oauth 1.0 token as explained in http://oauth.net/core/1.0/ The token is required for a Twitter filtered stream feed (and almost all Twitter API calls) This token is simply an encrypted version of your base string. The encryption key used is your hmac. The last part of the command scans the Base64 token string for '+', '/', and '=' characters and converts them to percentage-hex escape codes. (URI-escapeing). This is also a good example of where the $() syntax of Bash command substitution fails, while the backtick form ` works - the right parenthesis in the case statement causes a syntax error if you try to use the $() syntax here. See my previous two commands step1 and step2 to see how the base string variable $b and hmac variable $hmac are generated.

Get memory total from /proc/meminfo in Gigs

Make changes in .bashrc immediately available

Simply sourcing .bashrc does not function correctly when you edit it and change an alias for a function or the other way round with the *same name*. I therefor use this function. Prior to re-sourcing .bashrc it unsets all aliases and functions.

How To Get the Apache Document Root

Grabs the Apache config file (yielded from httpd) and returns the path specified as DocumentRoot.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

MoscowML with editable input-line and history

Works also with SML/NJ and other interpreters or tools with interactive environments.

Capture video of a linux desktop

Backup all mysql databases to individual files on a remote server

It grabs all the database names granted for the $MYSQLUSER and gzip them to a remote host via SSH.

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"

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