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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Block all IP addresses and domains that have attempted brute force SSH login to computer

I use iptables. To rate limit connections. Very easy and no ban lists to manage.

Reverse ssh

Both hosts must be running ssh and also the outside host must have a port forwarded to port 22.

find text in a file

this will find text in the directory you specify and give you line where it appears.

Disable beep sound from your computer

This command will disable the beep sound from the PC speaker.

Lists all directories under the current dir excluding the .svn directory and its contents

Down for everyone or just me?

Check if a site is down with downforeveryoneorjustme.com

Simple Comment an entire file

With this simple sed command we can easily comment and entire file.

pulsed terminal clock

hypnotizing pendulum

Recursively remove directory with many files quickly

rsync'ing an empty directory over a directory to be deleted recursively is much faster than using rm -rf, for various reasons. Relevant only for directories with really a lot of files.

Refresh the cache of font directory

Refresh the cache of font directory , usefull after you download font (.ttf or other) from various website and you don't want to reboot or relogin . Close your word processor before using the command , after the refresh reopen your word processor , new fonts is avaible !

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Commands tagged built-in (4)

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