Commands tagged cache sorted by votes

Commands tagged cache (11)

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prevent large files from being cached in memory (backups!)

We all know... nice -n19 for low CPU priority. ionice -c3 for low I/O priority. nocache can be useful in related scenarios, when we operate on very large files just a single time, e.g. a backup job. It advises the kernel that no caching is required for the involved files, so our current file cache is not erased, potentially decreasing performance on other, more typical file I/O, e.g. on a desktop. http://askubuntu.com/questions/122857 https://github.com/Feh/nocache http://packages.debian.org/search?keywords=nocache http://packages.ubuntu.com/search?keywords=nocache To undo caching of a single file in hindsight, you can do cachedel <OneSingleFile> To check the cache status of a file, do cachestats <OneSingleFile>
This is sample output - yours may be different.
21

nocache <I/O-heavy-command>

michelsberg · 2013-05-21 15:15:05 3
Load file into RAM (cache) for faster accessing for repeated usage

Best result when file size less than half of RAM size
This is sample output - yours may be different.
9

cat <file> > /dev/null

totti · 2011-11-12 15:45:27 3
Clear filesystem memory cache

Found here: http://ubuntuforums.org/showthread.php?t=589975
This is sample output - yours may be different.
7

sync && echo 3 | sudo tee /proc/sys/vm/drop_caches

mariusbutuc · 2011-10-18 15:22:25 0
Grab a list of MP3s out of Firefox's cache

Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the names of those tunes straight out of FF's cache in a nice, easy to read list. What you do with them after that is *ahem* no concern of mine. ;) Show Sample Output
This is sample output - yours may be different.
```
4CF25EB3d01
```
4

for i in `ls ~/.mozilla/firefox/*/Cache`; do file $i | grep -i mpeg | awk '{print $1}' | sed s/.$//; done

TuxOtaku · 2010-04-11 23:14:18 4
Grab a list of MP3s out of Firefox's cache

Grab a list of MP3s (with full path) out of Firefox's cache Ever gone to a site that has an MP3 embedded into a pesky flash player, but no download link? Well, this one-liner will yank the *full path* of those tunes straight out of FF's cache in a clean list. Shorter and Intuitive version of the command submitted by (TuxOtaku) Show Sample Output
This is sample output - yours may be different.
```
/home/sata/.mozilla/firefox/xmr8lfrq.default/Cache/FD44AC63d01
/home/sata/.mozilla/firefox/xmr8lfrq.default/Cache/C4C20071d01
/home/sata/.mozilla/firefox/xmr8lfrq.default/Cache/CD40802Cd01
```
2

find ~/.mozilla/firefox/*/Cache -exec file {} \; | awk -F ': ' 'tolower($2)~/mpeg/{print $1}'

sata · 2010-04-19 06:59:55 0
Empty Bind9 cache

Occasionally, to force zone updating, cache flush is necessary. The use of this command is better than restart the Bind9 process.
This is sample output - yours may be different.
2

rndc flush

ironmarc · 2011-10-21 14:27:05 0
Clear filesystem memory cache
This is sample output - yours may be different.
1

sysctl -w vm.drop_caches=3

sanidhya_k · 2011-10-18 18:23:38 0
clear MyDNS-ng cache

Occasionally, to force zone updating, cache flush is necessary. This command is better than restart the mydns daemon.
This is sample output - yours may be different.
1

kill -SIGHUP `cat /var/run/mydns.pid`

ironmarc · 2011-10-21 14:29:24 0
Flush DNS in Mac OS X
This is sample output - yours may be different.
0

dscacheutil ?flushcache

edshadi · 2012-07-04 17:04:52 0
To see which software currently open in directory /var/cache
This is sample output - yours may be different.
0

lsof -Pn +D /var/cache/ | awk '{print $1}' | sort | uniq

olto · 2015-11-12 05:30:44 0
Clear Cached Memory on Ubuntu

"That's it. Not much to see here. The first command writes any cache data that hasn't been written to the disk out to the disk. The second command tells the kernel to drop what's cached. Not much to it. This invalidates the write cache as well as the read cache, which is why we have the sync command first. Supposedly, it is possible to have some cached write data never make it to disk, so use it with caution, and NEVER do it on a production server. You could ... but why take the risk? As long as you are running a post 2.6.16 kernel,..." Source: http://ubuntuforums.org/showpost.php?p=3621283&postcount=1
This is sample output - yours may be different.
-1

sudo sync && sudo echo 3 | sudo tee /proc/sys/vm/drop_caches

StephenJudge · 2012-03-17 08:27:58 2

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Fork Bomb for Windows

Quick and dirty forkbomb for all flavors of windows Do not use in production. Replace start with a command of your choice, this will just open a new command prompt and is pretty tricky to stop once started

disk space email alert

put it in crontab to get an alert when / is over 89% utilization.

remove OSX resource forks ._ files

DESCRIPTION For each dir, dot_clean recursively merges all ._* files with their cor- responding native files according to the rules specified with the given arguments. By default, if there is an attribute on the native file that is also present in the ._ file, the most recent attribute will be used. If no operands are given, a usage message is output. If more than one directory is given, directories are merged in the order in which they are specified.

Matrix Style

Same as above but slooooow it down

lotto generator

Get your external IP address ( 10 characters long )

Shortest url to a external IP-service, 10 characters.

Find the package that installed a command

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"

ls -hog --> a more compact ls -l

I often deal with long file names and the 'ls -l' command leaves very little room for file names. An alternative is to use the -h -o and -g flags (or together, -hog). * The -h flag produces human-readable file size (e.g. 91K instead of 92728) * The -o suppresses the owner column * The -g suppresses the group column Since I use to alias ll='ls -l', I now do alias ll='ls -hog'

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Commands tagged cache (11)

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