Commands by birnam

Commands by birnam (4)

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determine if a shared library is compiled as 32bit or 64bit

Determines the flavor of a shared library by looking at the addresses of its exposed functions and seeing if they are 16 bytes or 8 bytes long. The command is written so the library you are querying is passed to a variable up font -- it would be simple to convert this to a bash function or script using this format. Show Sample Output
This is sample output - yours may be different.
```
/lib32/libgcc_s.so.1 is a 32 bit library
```
2

libquery=/lib32/libgcc_s.so.1; if [ `nm -D $libquery | sed -n '/[0-9A-Fa-f]\{8,\}/ {p; q;}' | grep "[0-9A-Fa-f]\{16\}" | wc -l` == 1 ]; then echo "$libquery is a 64 bit library"; else echo "$libquery is a 32 bit library"; fi;

birnam · 2010-03-07 04:24:08 4
Search for a <pattern> string inside all files in the current directory

This is how I typically grep. -R recurse into subdirectories, -n show line numbers of matches, -i ignore case, -s suppress "doesn't exist" and "can't read" messages, -I ignore binary files (technically, process them as having no matches, important for showing inverted results with -v) I have grep aliased to "grep --color=auto" as well, but that's a matter of formatting not function.
This is sample output - yours may be different.
50

grep -RnisI <pattern> *

birnam · 2009-09-22 15:09:43 33
gets the bare ip(s) of a domain

Strips the non-ip information from the dig output. Could be combined with "head -1" to ensure a single ip is returned. Useful for outputting as a variable for use in scripts. Show Sample Output
This is sample output - yours may be different.
```
208.94.117.60
208.94.116.176
208.94.117.125
```
0

dig commandlinefu.com | sed -nr 's/^[^;].*?\s([.0-9]{7,15})$/\1/ p'

birnam · 2009-08-07 16:11:31 4
extract all urls from firefox sessionstore

This will extract all of the urls from a firefox session (including urls in a tab's history). The sessionstore.js file is in ~/.mozilla/firefox/{firefox profile}
This is sample output - yours may be different.
2

sed -e "s/\[{/\n/g" -e "s/}, {/\n/g" sessionstore.js | grep url | awk -F"," '{ print $1 }'| sed -e "s/url:\"$[^\"]*$\"/\1/g" -e "/^about:blank/d" > session_urls.txt

birnam · 2009-06-14 15:08:31 11

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Clean all .pyc files from current project. It cleans all the files recursively.

Count accesses per domain

count the times a domain appears on a file which lines are URLs in the form http://domain/resource.

Binary difference of two files

Upload/download newer version of any file with less size and high speed. To remake the new file use $bspatch

back up your commandlinefu contributed commands

Use `zless` to read the content of your *rss.gz file: $ zless commandlinefu-contribs-backup-2009-08-10-07.40.39.rss.gz

Replace the content of an XML element

Replaces "650" with "999" in simple.xml. xml used - http://www.w3schools.com/xml/simple.xml

view the system memory in clear text

see what's in your memory right now... sometimes you find passwords, account numbers and url's that were recently used. Anyone have a safe command to clear the memory without rebooting?

Lists unambigously names of all xml elements used in files in current directory

This set of commands was very convenient for me when I was preparing some xml files for typesetting a book. I wanted to check what styles I had to prepare but coudn't remember all tags that I used. This one saved me from error-prone browsing of all my files. It should be also useful if one tries to process xml files with xsl, when using own xml application.

Get a qrcode for a given string

Check command history, but avoid running it

!whatever will search your command history and execute the first command that matches 'whatever'. If you don't feel safe doing this put :p on the end to print without executing. Recommended when running as superuser.

Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

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