Commands using tee sorted by votes

Commands using tee (116)

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Simple word scramble

enlubtsqyuse cat /tmp/out subsequently Show Sample Output
This is sample output - yours may be different.
```
enlubtsqyuse
```
1

shuf -n1 /usr/share/dict/words | tee >(sed -e 's/./&\n/g' | shuf | tr -d '\n' | line) > /tmp/out

jnash · 2009-04-05 05:29:06 7
Backup with SSH in a archive

PRIVATEKEY - Of course the full path to the private key \n HOST - The host where to get the backup \n SOURCE - The directory you wish to backup \n DESTINATION - The destination for the backup on your local machine
This is sample output - yours may be different.
1

ssh -i $PRIVATEKEY $HOST -C 'cd $SOURCE; tar -cz --numeric-owner .' | tee $DESTINATION/backup.tgz | tar -tz

GeckoDH · 2009-05-18 20:36:45 4
bash or tcsh redirect both to stdout and to a file

When plumbers use pipes, they sometimes need a T-joint. The Unix equivalent to this is 'tee'. The -a flag tells 'tee' to append to the file, rather than clobbering it. Tested on bash and tcsh. Show Sample Output
This is sample output - yours may be different.
```
$ echo "Hello World." | tee -a hello.txt
Hello World.
$ cat hello.txt
Hello World.
```
1

echo "Hello World." | tee -a hello.txt

thebillywayne · 2009-06-26 00:55:59 9
Create a single-use TCP proxy with copy to stdout

USAGE: gate listening_port host port Creates listening socket and connects to remote device at host:port. It uses pipes for connection between two sockets. Traffic which goes through pipes is wrote to stdout. I use it for debug network scripts.
This is sample output - yours may be different.
1

gate() { mkfifo /tmp/sock1 /tmp/sock2 &> /dev/null && nc -p $1 -l < /tmp/sock1 | tee /tmp/sock2 & PID=$! && nc $2 $3 < /tmp/sock2 | tee /tmp/sock1; kill -KILL $PID; rm -f /tmp/sock1 /tmp/sock2 ; }

true · 2009-09-25 08:10:23 4
send incoming audio to a Icecast server (giss.tv)

easy way to setup an "internet radio sation", pre-requisite, create an account at an icecast server, in this example, just created beforehand an account at giss.tv. Change the word password, with the respective real password you created at server. Make sure to have installed rec, oggnec, oggfwd and tee. I have a mixer connected at line in, so I can mix music and microphone. This also will produce a local recorded copy of the session, it will be called "streamdump.ogg" Show Sample Output
This is sample output - yours may be different.
```
Input File     : 'default' (alsa)
Channels       : 2
Sample Rate    : 44100
Precision      : 16-bit
Sample Encoding: 16-bit Signed Integer PCM

In:0.00% 00:00:00.09 [00:00:00.00] Out:0     [      |      ]        Clip:0    Opening with wav module: WAV file reader
Encoding standard input to 
         standard output 
at quality 3.00
In:0.00% 00:00:00.56 [00:00:00.00] Out:20.5k [      |      ]        Clip:0    oggfwd: Connected to server
```
1

rec -c 2 -r 44100 -s -t wav - | oggenc - | tee streamdump.ogg | oggfwd giss.tv 8000 password /mountpoint.ogg

odaibanet · 2010-05-07 12:57:37 7
geoip information

Show external IP and geolocation information. Primary feature is the use of tee to echo IP _and_ send to geoiplookup command...Use IP as input for as many commands as you want with more >( [command] ) Thanks to http://www.commandlinefu.com/commands/view/6334/ Requires MaxMind DB and geoiplookup tool. Sample output has IP obfuscated on first line, lines 2-4 from having MaxMind Country && MaxMind City DBs installed Show Sample Output
This is sample output - yours may be different.
```
***.***.***.***
GeoIP Country Edition: US, United States
GeoIP City Edition, Rev 1: US, WA, Seattle, 98194, 47.595100, -122.332603, 819, 206
GeoIP City Edition, Rev 0: US, WA, Seattle, 98194, 47.595100, -122.332603
```
1

curl -s ifconfig.me|tee >(xargs geoiplookup)

MeanderingCode · 2012-02-09 20:30:26 4
Suspend to ram

Using sys
This is sample output - yours may be different.
1

echo mem|sudo tee /sys/power/state

kbaegis · 2012-04-13 22:46:55 5
save stderr only to a file

taken from http://www.unix.com/shell-programming-scripting/158311-how-tee-stderr.html " What does it mean? The redirection operator n>&m makes file descriptor n to be a copy of file descriptor m. So, whe are: - Opening a new file descriptor, 3, that is a copy of file descriptor 1, the standard output; - Making file descriptor 1 a copy of file descriptor 2, the standard error output; - Making file descriptor 2 to be a copy of file descriptor 3 (the "backup" of the standard output) in a short: we swapped the standard output and the standard error output. "
This is sample output - yours may be different.
1

command 3>&1 1>&2 2>&3 | tee file

hute37 · 2012-10-30 10:53:21 5
Get MD5 checksum from a pipe stream and do not alter it
This is sample output - yours may be different.
1

cat somefile | tee >(openssl md5 > sum.md5) | bzip2 > somefile.bz2

bugmenot · 2013-01-14 22:03:46 6
Update a namecheap @ A record to point to your current internet-facing IP address

Sets the @ A record for your domain hosted by namecheap to your current internet-facing IP address, logs success or failure with syslog, and logs the data returned to /root/dnsupdate. Change the XXX's as appropriate. More info at: http://www.namecheap.com/support/knowledgebase/article.aspx/29/ Show Sample Output
This is sample output - yours may be different.
```
Aug 11 12:05:22 sync dnsupdate: Update Sucessful
```
1

logger -tdnsupdate $(curl -s 'https://dynamicdns.park-your-domain.com/update?host=@&domain=xxx&password=xxx'|tee -a /root/dnsupdate|perl -pe'/Count>(\d+)<\/Err/;$_=$1eq"0"?"Update Sucessful":"Update failed"'&&date>>/root/dnsupdate)

MagisterQuis · 2013-08-11 16:27:39 7
Copy one file to multiple files

Copies file.org to file.copy1 ... file.copyn
This is sample output - yours may be different.
1

tee < file.org file.copy1 file.copy2 [file.copyn] > /dev/null

dacoman · 2014-10-02 16:41:36 7
Making scripts runs on backgourd and logging output

Save all output to a log.
This is sample output - yours may be different.
1

nohup bash example.sh 2>&1 | tee -i i-like-log-files.log &

Tatsh · 2015-09-02 06:07:11 16
Set all CPU cores' CPU frequency scaling governor to maximum performance
This is sample output - yours may be different.
1

echo performance |sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

phrik · 2017-11-13 12:34:32 20
Blackhole any level zones via dnsmasq

Explanation It creates dnsmasq-com-blackhole.conf file with one line to route all domains of com zones to 0.0.0.0 You might use "address=/home.lab/127.0.0.1" to point allpossiblesubdomains.home.lab to your localhost or some other IP in a cloud. Show Sample Output
This is sample output - yours may be different.
```
#on ubuntu/debian
echo "address=/com/0.0.0.0" | sudo tee /etc/NetworkManager/dnsmasq.d/dnsmasq-com-blackhole.conf && sudo systemctl restart network-manager

#on redhat/centos
echo "address=/com/0.0.0.0" | sudo tee /etc/dnsmasq.d/dnsmasq-com-blackhole.conf && sudo systemctl restart dnsmasq
```
1

echo "address=/com/0.0.0.0" | sudo tee /etc/dnsmasq.d/dnsmasq-com-blackhole.conf && sudo systemctl restart dnsmasq

emphazer · 2018-05-14 16:28:18 164
Assign top-level JSON entries to shell variables

A recursive version might be useful too. /dev/tty is used to show which shell variables just got defined. Show Sample Output
This is sample output - yours may be different.
```
a="42";
b="s t r i n g";
```
1

json='{"a":42, "b":"s t r i n g", "c": []}' ; eval $(echo $json | jq -r 'to_entries | .[] | select(.value | scalars) | .key + "=\"" + (.value | tostring) + "\";"' | tee /dev/tty)

penthief · 2023-09-26 03:11:38 714
append content of a file to itself

The command `cat file >> file` failes with the following error message: cat: file: input file is output file `tee` is a nice workaround without using any temporary files. Show Sample Output
This is sample output - yours may be different.
```
echo "Just one line" >> file
cat file
> Just one line
cat file | tee >> file
cat file
> Just one line
> Just one line
```
0

cat file | tee >> file

GeckoDH · 2009-07-30 07:34:03 7
Transfer sqlite3 data to mysql

Filters out all non-insert SQL operations (we couldn't filter out only lines starting with "INSERT" because inserts can span multiple lines), quotes table names with backticks, saves dump to a file and pipes it straight to mysql. This transfers only data--it expects your schema is already in place. In Ruby on Rails, you can easily recreate the schema in MySQL with "rake db:schema:load RAILS_ENV=production".
This is sample output - yours may be different.
0

sqlite3 mydb.sqlite3 '.dump' | grep -vE '^(BEGIN|COMMIT|CREATE|DELETE)|"sqlite_sequence"' | sed -r 's/"([^"]+)"/`\1`/' | tee mydb.sql | mysql -p mydb

mislav · 2009-10-02 14:40:51 4
download with checksum

other options: * replace md5sum with sha1sum for SHA1 checksum * replace '>' with '| tar zx' for extracting tarball Show Sample Output
This is sample output - yours may be different.
```
$ wget -qO - http://www.google.com | tee >(md5sum) > /tmp/index.html
9e1f929ea8ffcd508d1fb412cd1abf38  -
```
0

wget -qO - http://www.google.com | tee >(md5sum) > /tmp/index.html

jianingy · 2010-07-23 06:29:29 4
Stream and save Youtube video

Watch a video while it's downloading. It's additionally saved to the disk for later viewing.
This is sample output - yours may be different.
0

wget `youtube-dl -g 'http://www.youtube.com/watch?v=-S3O9qi2E2U'` -O - | tee -a parachute-ending.flv | mplayer -cache 8192 -

artagnon · 2010-10-28 13:51:59 3
Watch and keep history of a command

Watch any command (pipes ok, quotes be careful) and keep history in a file. Good for watching and recording any kind of status or error condition, file creations, etc. The choice of "who" as CMD was just to show an obvious usage. Uses plenty of shell tricks that can be disassembled for simpler stuff. It's deliberately not perfect, but it is generic, and can be customized for your own uses. Had to shorten a little to meet 255 chars. Better than "watch" how? It keeps a date log of what is going on, and tee'd output is plain-text. Show Sample Output
This is sample output - yours may be different.
```
Mon Dec 25 14:15:30 EST 2099
Diff #0 (1s): who
1c1
<
---
> [me]     pts/1        2099-12-25 09:50 ([i.forget])
Mon Dec 25 14:15:32 EST 2099
Diff #4 (1s): who
1a2
> [notme]  pts/2        2099-12-25 14:15 ([i.forget])
Mon Dec 25 14:20:37 EST 2099
Diff #11 (1s): who
1a2
< [notme]  pts/2        2099-12-25 14:15 ([i.forget])
```
0

CMD="who";SEC=1;N=0;OLD="";NEW=""; while `sleep $SEC`; do OLD="$NEW"; NEW="$(eval $CMD)"; DIFF=`diff <( echo "$OLD" ) <( echo "$NEW" )`; if [ -n "$DIFF" ]; then date; echo "Diff #$N (${SEC}s): $CMD"; echo "$DIFF"; fi; N=$[$N+1]; done | tee /tmp/keepr

DoNotRememberMe · 2010-11-15 19:55:39 3
Backup to tape, rewind and check md5

Backups $DIR_TO_BACKUP into tape, creating on the fly a MD5SUM file of the backup. Then rewinds one record on tape and checks if it's well written.
This is sample output - yours may be different.
0

tar -cvf - $DIR_TO_BACKUP | tee >(md5sum > backup_md5.txt) > /dev/st0 && mt -f /dev/nst0 bsfm 1 && md5sum -c backup_md5.txt < /dev/st0

bugmenot · 2011-01-27 20:57:36 4
Dump /dev/ttyS0 on background automatically from startup

Put this command on /etc/rc.local.
This is sample output - yours may be different.
0

nohup cat /dev/ttyS0 | tee -a llamadas.db&

fjrojast · 2011-05-05 15:47:27 3
use md5sum -c recursively through subdirectory tree when every directory has its own checksum file

extracts path to each md5 checksum file, then, for each path, cd to it, check the md5sum, then cd - to toggle back to the starting directory. greps at the end to remove cd chattering on about the current directory.
This is sample output - yours may be different.
0

for i in $(find . -name *md5checksum_file* | sed 's/$\.\/.*$md5checksum_file.txt/\1/'); do cd "$i"; md5sum -c "md5checksum_file.txt"; cd -; done | tee ~/checksum_results.txt | grep -v "<current directory>"

gocoogs · 2011-05-17 01:08:44 3
Find directories with lots of files in them

Find which directories on your system contain a lot of files. Edit: much shorter and betterer with -n switch. Show Sample Output
This is sample output - yours may be different.
```
2958	/var/www/vhosts/example.com/dir1
2259	/usr/share/man/man3
1283	/var/www/vhosts/example.com/dir2
1124	/usr/share/man/man3p
1091	/usr/share/man/man1
861	/var/www/vhosts/example.com/dir3
763	/usr/bin
717	/var/www/vhosts/example.com/dir4
```
0

sudo find / -type f | perl -MFile::Basename -ne '$counts{dirname($_)}++; END { foreach $d (sort keys %counts) {printf("%d\t%s\n",$counts{$d},$d);} }'|sort -rn | tee /tmp/sortedfilecount.out | head

tamouse · 2011-09-14 19:41:19 3
List down source files which include another source file
This is sample output - yours may be different.
0

find . -type f $ -name '*.c' -o -name '*.cpp' -o -name '*.cc' -o -name '*.cxx' $ | xargs grep "#include.*\.c.*" 2>&1 | tee source_inside_source_list.txt

rajendra_s_y · 2012-07-17 09:41:18 3
< 1 2 3 4 5 >

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gzip over ssh

I've kept the gzip compression at a low level, but depending on the cpu power available on the source machine you may want to increase it. However, SQL compresses really well, and I found even with -1 I was able to transfer 40 MiB/s over a 100 mbps wire, which was good enough for me.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Combine cssh and shell expansion to execute commands on a large cluster

This will open an awful lot of little windows, but is quite useful if you want to quickly patch something on a cluster of servers.

Output files without comments or empty lines

better integration. works on all Unices works one bash and ksh.

check the status of 'dd' in progress (OS X)

Sends SIGINFO to the process. This is a BSD feature OS X inherited. You must have the terminal window executing dd selected when entering CTRL + T for this to work.

Analyse an Apache access log for the most common IP addresses

This uses awk to grab the IP address from each request and then sorts and summarises the top 10.

Quickly build ulimit command from current values

It is helpful to know the current limits placed on your account, and using this shortcut is a quick way to figuring out which values to change for optimization or security. Alias is: $ alias ulimith="command ulimit -a|sed 's/^.*$[a-z]$)$.*$$/-\1\2/;s/^/ulimit /'|tr '\n' ' ';echo" Here's the result of this command: $ ulimit -c 0 -d unlimited -e 0 -f unlimited -i 155648 -l 32 -m unlimited -n 8192 -p 8 -q 819200 -r 0 -s 10240 -t unlimited -u unlimited -v unlimited -x unlimited $ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 155648 max locked memory (kbytes, -l) 32 max memory size (kbytes, -m) unlimited open files (-n) 8192 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) unlimited virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

Echo the contents of a Url

Directly send the content of a url to standard out. This command is most convenient for sending the output of a download directly to another command.

Stream your desktop to a remote machine.

This allows you to stream your desktop using vlc to another computer, in this case, 192.168.1.2 on your local network. If you have vlc installed, your all set to try this out. To view your own desktop, just run "vlc screen://" For more info, see http://nerdlogger.com/2008/01/08/stream-your-linuxwindowsmac-desktop-as-video-using-vlc/

The wisdom of Cave Johnson

There's been a similar Futurama thing around for a while, which grabs a quote from the /. headers [curl -Ism3 slashdot.org | egrep "^X-(F|B|L)" | cut -d \- -f 2- | fmt -w $(tput cols)]. Same deal, but more likely to stop working when someone forgets to pay the bill on the domain. Until then: Cave Johnson!

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Commands using tee (116)

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