Commands tagged built-in sorted by votes

Commands tagged built-in (4)

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Fast, built-in pipe-based data sink

This is shorter and actually much faster than >/dev/null (see sample output for timings) Plus, it looks like a disappointed face emoticon. Show Sample Output
This is sample output - yours may be different.
```
# with >/dev/null:
$ time dd if=/dev/zero bs=1K count=100000 >/dev/null

100000+0 records in
100000+0 records out
102400000 bytes (102 MB) copied, 0.0355178 s, 2.9 GB/s

real    0m0.037s
user    0m0.011s
sys     0m0.025s

# with |:
$ time dd if=/dev/zero bs=1K count=100000 |:

real    0m0.002s
user    0m0.000s
sys     0m0.002s
```
22

<COMMAND> |:

h3xx · 2011-08-28 23:48:29 13
Show only existing executable dirs in PATH using only builtin bash commands

Finds executable and existing directories in your path that can be useful if migrating a profile script to another system. This is faster and smaller than any other method due to using only bash builtin commands. See also: + http://www.commandlinefu.com/commands/view/743/list-all-execs-in-path-usefull-for-grepping-the-resulting-list + http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output
This is sample output - yours may be different.
```
~/askapache/bin
~/askapache/sbin
/bin
/etc
/sbin
/usr/X11R6/bin
/usr/bin
/usr/bin/mh
/usr/libexec
/usr/local/bin
/usr/sbin
/etc/X11
/etc/X11/xinit
~/askapache/ruby/bin
/usr/local/dh/apache/template/bin
/usr/local/dh/apache2/template/bin
/usr/local/dh/apache2/template/build
/usr/local/dh/apache2/template/sbin
/usr/local/dh/bin
/usr/local/dh/java/bin
/usr/local/dh/java/jre/bin
/usr/local/php5/bin
.
```
2

for p in ${PATH//:/ }; do [[ -d $p && -x $p ]] && echo $p; done

AskApache · 2009-09-19 06:43:57 1
Redirect bash built-in output to stdout

I've had a horrible time trying to pipe the output of some shell built-ins like 'time' to other programs. The built-in doesn't output to stdout or stderr most of the time but using the above will let you pipe the output to something else. Show Sample Output
This is sample output - yours may be different.
```
$ TIME=$( { time host reddit.com; } 2>&1 ) ; echo $TIME
reddit.com has address 63.85.36.40 reddit.com has address 63.85.36.74 reddit.com mail is handled by 10 mail.reddit.com. real 0m0.201s user 0m0.001s sys 0m0.001s
```
1

TIME=$( { time YOUR_COMMAND_HERE; } 2>&1 ) ; echo $TIME

allrightname · 2010-11-18 15:48:05 0
Fast, built-in pipe-based data sink
This is sample output - yours may be different.
-2

command >&-

lhunath · 2011-08-30 13:52:09 2

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Set executable permissions on a file under Subversion

This avoids the "chmod +x filename" after performing a check out or export. From http://snipplr.com/view/5277/set-executable-permissions-on-a-file-under-subversion/

Import SQL into MySQL with a progress meter

This uses PV to monitor the progress of the MySQL import and displays it though Zenity. You could also do this pv ~/database.sql | mysql -u root -pPASSWORD -D database_name and get a display in the CLI that looks like this 2.19MB 0:00:06 [ 160kB/s] [> ] 5% ETA 0:01:40 My Nautalus script using this command is here http://www.daniweb.com/forums/post1253285.html#post1253285

Google text-to-speech in mp3 format

Are the two lines anagrams?

This works by reading in two lines of input, turning each into a list of one-character matches that are sorted and compared.

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"

Grep Recursively Through Single File Extension

Trac 0.12.2-stable

grep -v with multiple patterns.

You can use -e to pass multiple patterns.

Easy to extend one-liner for cron scripts that automate filesystem checking

This one-liner is for cron jobs that need to provide some basic information about a filesystem and the time it takes to complete the operation. You can swap out the di command for df or du if that's your thing. The |& redirections the stderr and stdout to the mail command. How to configure the variables. TOFSCK=/path/to/mount FSCKDEV=/dev/path/device or FSCKDEV=`grep $TOFSCK /proc/mounts | cut -f1 -d" "` MAILSUB="weekly file system check $TOFSCK "

MP3 player

I tried a few curses based mp3 players for playing back choir practice songs for my wife. Unfortunately none of the ones I tried were capable of scrubbing a track. Firefox saves the day.

Directory bookmarks

pushd and popd are your friends, but sometimes they're just incompatible with the way one works... Two shell functions: bm bookmarkname - "bookmarks" the current directory, just 'cd $BMbookmarkname' to return to it. forget bookmarkname - unsets the 'bookmarkname' variable. It isn't mandatory, they cease to exist when the session ends.

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Commands tagged built-in (4)

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