Commands by randy909

Commands by randy909 (9)

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Join lines

Even shorter. Stolen from comment posted by eightmillion.
This is sample output - yours may be different.
7

tr "\n" " " < file

randy909 · 2010-12-08 16:13:54 5
finding cr-lf files aka dos files with ^M characters

Where ^M is entered by ctrl-v-m (v then m). Especially useful on cygwin when checking into a version control system. If you're not using all cygwin tools (e.g. strawberry perl instead of cygwin perl) you'll find yourself dealing with this constantly. -U tells grep to process the file as binary; it needs this to work -I ignores binary files so you won't get false positives -l only prints the filename instead of the offending lines -r recursive
This is sample output - yours may be different.
0

grep -UIlr "^M" *

randy909 · 2010-08-20 21:16:34 4
List files with quotes around each filename

I had a file named " " (one space) and needed a way to see what the real filename was so I could remove it. sed to the rescue. Show Sample Output
This is sample output - yours may be different.
```
"foo"
"bar "
" "
```
-2

ls | sed 's,$.*$,"\1",'

randy909 · 2010-08-17 14:27:27 5
Squish repeated delimiters into one

This can be particularly useful used in conjunction with a following cut command like echo "hello::::there" | tr -s ':' | cut -d':' -f2 which prints 'there'. Much easier that guessing at -f values for cut. I know 'tr -s' is used in lots of commands here already but I just figured out the -s flag and thought it deserved to be highlighted :) Show Sample Output
This is sample output - yours may be different.
```
hello:there
```
1

echo "hello::::there" | tr -s ':'

randy909 · 2010-08-12 16:23:06 6
Converts uppercase chars in a string to lowercase

Another way to do it with slightly fewer characters. It doesn't work on Russian characters; please don't vote down because of that. :p It's very handy for those of us working in ascii :) Show Sample Output
This is sample output - yours may be different.
```
string
```
0

echo StrinG | tr 'A-Z' 'a-z'

randy909 · 2010-08-12 15:42:56 4
List files with full path

This version is a bit more portable although it isn't extended as easily with '-type f' etc. On AIX the find command doesn't have -maxdepth or equivalent.
This is sample output - yours may be different.
2

ls | sed s#^#$(pwd)/#

randy909 · 2010-08-04 20:47:44 7
List files with full path

Prints contents of current directory with the full path prepended to each entry. You can add '-type f' if you don't want the directories to show up (for those less familiar with find). I can't believe ls doesn't have an option for this. Show Sample Output
This is sample output - yours may be different.
```
/foo/bar/file1
/foo/bar/file2
/foo/bar
```
4

find $(pwd) -maxdepth 1

randy909 · 2010-08-04 17:49:22 5
Print a list of installed Perl modules

This version works on an AIX system on which I have very limited permissions. The other version fails with "Can't open file /usr/opt/perl588/lib/site_perl/5.8.8/aix/auto/DBI/.packlist".
This is sample output - yours may be different.
3

perl -MFile::Find=find -MFile::Spec::Functions -Tlwe 'find { wanted => sub { print canonpath $_ if /\.pm\z/ }, no_chdir => 1 }, @INC'

randy909 · 2010-08-02 15:18:51 4
Find PHP files

xargs avoids having to remember the "{} \;" (although definitely a useful thing to know. Unfortunately I always forget it). xargs version runs 2x faster on my test fwiw. edit: fixed to handle spaces in filenames correctly.
This is sample output - yours may be different.
-2

find . -name "*.php" -print0 | xargs -0 grep -i "search phrase"

randy909 · 2010-07-27 20:52:37 5

What's this?

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List your installed Firefox extensions

Find C/C++ source files

Find C/C++ source files and headers in the current directory.

list files recursively by size

View ~/.ssh/known_hosts key information

Will return the SSH server key information for each host you have in your ~/.ssh/known_hosts file, including key size, key fingerprint, key IP address or domain name, and key type.

List out classes in of all htmls in directory

Lists out all classes used in all *.html files in the currect directory. usefull for checking if you have left out any style definitions, or accidentally given a different name than you intended. ( I have an ugly habit of accidentally substituting camelCase instead of using under_scores: i would name soemthing counterBox instead of counter_box) WARNING: assumes you give classnames in between double quotes, and that you apply only one class per element.

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.

convert single digit to double digits

Uses 'rename' to pad zeros in front of first existing number in each filename. The "--" is not required, but it will prevent errors on filenames which start with "-". You can change the "2d" to any number you want, equaling the total numeric output: aka, 4d = ????, 8d = ????????, etc. I setup a handful of handy functions to this effect (because I couldn't figure out how to insert a var for the value) in the form of 'padnum?', such as: padnum5 () { /usr/bin/rename 's/\d+/sprintf("%05d",$&)/e' -- $@ } Which would change a file "foo-1.txt" to "foo-00001.txt"

fast access to any of your favorite directory.

example: -------------------------------------------------------------------------------------------- user@ubuntu:~/workspace/SVN/haystak-repos/trunk/internal/src$ addpi -------------------------------------------------------------------------------------------- Now that directory is in the list of fast access directories. You can switch to it anytime like this: -------------------------------------------------------------------------------------------- user@ubuntu:~$ pi internal` user@ubuntu:~/workspace/SVN/haystak-repos/trunk/internal/src$ -------------------------------------------------------------------------------------------- Please note the backquote ( the symbol that shares its key with ~ in the keyboard ) pi will switch you to that directory. To see the list of all fast access directories you have to say "cat ~/.pi"

List recorded formular fields of Firefox

When you fill a formular with Firefox, you see things you entered in previous formulars with same field names. This command list everything Firefox has registered. Using a "delete from", you can remove anoying Google queries, for example ;-)

Generate diff of first 500 lines of two files

Useful for massive files where doing a full diff would take too long. This just runs diff on the first 500 lines of each. The use of subshells to feed STDIN is quite a useful construct.

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