Commands tagged Linux sorted by votes

Commands tagged Linux (266)

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AllInOne package maintainance

# AllInOne: Update what packages are available, upgrade to new versions, remove unneeded packages # (some are no longer needed, replaced by the ones from ap upgrade), check for dependencies # and clean local cached packages (saved on disk but not installed?,some are needed? [this only cleans unneeded unlike ap clean]). # aliases (copy into ~/.bashrc file): alias a='alias' a ap='apt-get' a r='ap autoremove -y' a up='ap update' a u='up && ap upgrade -y --show-progress && r && ap check && ap autoclean' # && means "and run if the previous succeeded", you can change it to ; to "run even if previous failed". I'm not sure if ap check should be before or after ap upgrade -y, you can also change the alias names. # To expand aliases in bash use ctrl alt e or see this ow.ly/zBKHs # For more useful aliases go to ow.ly/zBMOx
This is sample output - yours may be different.
0

apt-get update && apt-get dist-upgrade -y --show-progress && apt-get autoremove -y && apt-get check && apt-get autoclean -y

unixmonkey78577 · 2014-07-26 12:18:57 6
Send a message to Kodi (XBMC)

Send a text message to an Kodi (XBMC) device. Uses curl to post a JSON request to the Kodi JSON-RPC API.
This is sample output - yours may be different.
0

curl -X POST -H "Content-Type: application/json" -d '{"jsonrpc":"2.0","method":"GUI.ShowNotification","params":{"title":"This is the title of the message","message":"This is the body of the message"},"id":1}' http://i3c.pla.lcl:8080/jsonrpc

PLA · 2014-08-24 21:49:13 29
10 files backup rotate in crontab

this command can be added to crontab so as to execute a nightly backup of directories and store only the 10 last backup files.
This is sample output - yours may be different.
0

for file in $(find /var/backup -name "backup*" -type f |sort -r | tail -n +10); do rm -f $file; done ; tar czf /var/backup/backup-system-$(date "+\%Y\%m\%d\%H\%M-\%N").tgz --exclude /home/dummy /etc /home /opt 2>&- && echo "system backup ok"

akiuni · 2014-09-24 14:04:11 10
extract and initrd image

this command extracts an initrd files into the "tmp" directory
This is sample output - yours may be different.
0

mkdir tmp ; cd tmp ; zcat ../initrd.gz | cpio -i

akiuni · 2014-09-24 14:06:38 30
return external ip

Also resolves hostname
This is sample output - yours may be different.
0

nslookup . ifcfg.me

Eun · 2014-11-17 09:35:28 7
Detect encoding of a text file
This is sample output - yours may be different.
0

uchardet <filename>

fltman · 2014-11-28 07:47:13 7
df without line wrap on long FS name

To be OS independent you should try df -Pk first (Linux) and if it does not work (that's the ||) then use df -k (e.g. for Solaris, HP UX, AIX). To get the output in a single line, use the additional cat.
This is sample output - yours may be different.
0

(df -Pk 2>/dev/null|| df -k) | cat

ffeldhaus · 2015-01-15 22:38:36 9
Multiple level ssh

If you are on machine 1 and want to ssh into machine 3, but you can only do so from machine 2, this will do it all in one go. Note that once you are on machine 3 and exit () it will take you directly back to machine 1
This is sample output - yours may be different.
0

ssh -t user@domain.com "ssh -t user2@domain2.com bash -l"

texasflood · 2015-02-11 16:15:01 10
Run bash script from web

Use this command to execute the contents of http://www.example.com/automation/remotescript.sh in the local environment. The parameters are optional. Alterrnatives to wget: CURL: curl -s http://www.example.com/automation/remotescript.sh | bash /dev/stdin param1 param2 W3M: w3m -dump http://www.example.com/automation/remotescript.sh | bash /dev/stdin [param1] [param2] LYNX: lynx -source http://www.example.com/automation/remotescript.sh | bash /dev/stdin [param1] [param2]
This is sample output - yours may be different.
0

wget -q -O - http://www.example.com/automation/remotescript.sh | bash /dev/stdin parameter1 parameter2

paulera · 2015-02-16 16:55:09 16
Copy the partition table from /dev/sda to /dev/sdb

Copy the partition table from /dev/sda to /dev/sdb. Be careful to get your drive names right.
This is sample output - yours may be different.
0

sfdisk -d /dev/sda | sudo sfdisk /dev/sdb

shanglin · 2015-03-10 18:11:10 9
Get all shellcode on binary file from objdump
This is sample output - yours may be different.
0

echo "\"$(objdump -d BINARY | grep '[0-9a-f]:' | cut -d$'\t' -f2 | grep -v 'file' | tr -d " \n" | sed 's/../\\x&/g')\""

reiderroque · 2015-09-25 20:21:26 11
Search entire web server for preg_replace /e based php malware.
This is sample output - yours may be different.
0

find / -name \*.php -exec grep -Hn preg_replace {} \;|grep /e|grep POST

UnklAdM · 2015-10-28 16:10:23 10
show number of established TCP connections
This is sample output - yours may be different.
0

ss -s | sed -n '/.*estab $[0-9]*$.*/s//\1/p'

phrik · 2015-12-08 12:35:22 11
Bulk change of mail domains in Rainloop

I had to reconfigure all of my 150 domains to use "localhost" as IMAP/SMTP server instead of mail.[domain]. This little thing did the job in a fraction of a second!
This is sample output - yours may be different.
0

sed -i -E 's/mail\..*/localhost\"/g' *

Blagus · 2016-01-15 14:48:32 10
Test remote SSH server status using telnet (no login required)

This command telnet and and looks for a line starting with "SSH" - works for OpenSSH since the SSH banner is something like "SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u3". Then it triggers an action accordingly. It can be packed as a script file to echo 0/1 indicating the SSH service availability: if [[ "$(sleep 1 | telnet -c <host> <port> 2>&1 | grep '^SSH')" == SSH* ]]; then echo 1; else echo 0; fi; Alternative uses: Trigger an action when server is UP (using &&): [[ "$(sleep 1 | telnet -c <host> <port> 2>&1 | grep '^SSH')" == SSH* ]] && <command when up> Trigger an action when server is DOWN (using ||): [[ "$(sleep 1 | telnet -c <host> <port> 2>&1 | grep '^SSH')" == SSH* ]] || <command when down>
This is sample output - yours may be different.
0

$if [[ "$(sleep 1 | telnet -c <host> <port> 2>&1 | grep '^SSH')" == SSH* ]]; then <command when up>; else <command when down>; fi;

paulera · 2016-02-02 13:06:51 16
List latest 5 modified files recursively

This command will find any named file types in / between two dates then will list all the metadata of those files in long format and human readable form. Adding a 't' flag to the ls command sorts the files by modified time. After all that the head -5 lists the first 5 which can be changed.
This is sample output - yours may be different.
0

ls -laht `find / -name "*.*" -type f -newermt "2016-04-05" ! -newermt "2016-04-10"`|head -5

ubercoo · 2016-04-19 14:26:23 10
Diff two directories by finding and comparing the md5 checksums of their contents.

As output, checksums and filenames will be printed.
This is sample output - yours may be different.
0

diff <(sort <(md5deep -r /directory/1/) | awk -F '/' '{print $1 $NF}') <(sort <(md5deep -r /directory/2/) | awk -F '/' '{print $1 $NF}')

linux_noob · 2016-06-06 20:05:01 11
better forkbomb (*DO NOT USE*)

Don't use. This defines a function `:` that will create two more of itself, infinitely in the background. While this function is itself defined in the background, it is run up in the front.
This is sample output - yours may be different.
0

:(){ :|:& }&:

tox123 · 2016-08-05 15:45:10 14
Diff two directories by finding and comparing the md5 checksums of their contents.

Results will be shown in columns. Only different files and files in one directory that is not in the other will be shown.
This is sample output - yours may be different.
0

diff -y --suppress-common-lines <(sort -k2 <(md5deep -r -b directory1)) <(sort -k2 <(md5deep -r -b directory2))

MeLoPasoPipa · 2016-08-18 09:17:16 12
Sum file sizes of found files
This is sample output - yours may be different.
0

find . -mtime +30 -exec ls -all "{}" \; | awk '{COUNTER+=$5} END {SIZE=COUNTER/1024/1024; print "size sum of found files is: " SIZE "MB"}'

breign · 2016-10-28 08:05:57 16
copy one partition to another with progress

uses the wonderful 'pv' command to give a progress bar when copying one partition to another. Amazing for long running dd commands Show Sample Output
This is sample output - yours may be different.
```
1.18TiB 9:24:52 [  38MiB/s] [===================================================================================>      ] 94% ETA 0:35:27
```
0

pv -tpreb /dev/sdc2 | dd of=/dev/sdb2 bs=64K conv=noerror,sync

4fthawaiian · 2016-12-22 03:18:09 14
Find the top most 5 duplicate files in a folder

To allow recursivity : find -type f -exec md5sum '{}' ';' | sort | uniq -c -w 33 | sort -gr | head -n 5 | cut -c1-7,41- Display only filenames : find -maxdepth 1 -type f -exec md5sum '{}' ';' | sort | uniq -c -w 33 | sort -gr | head -n 5 | cut -c43- Show Sample Output
This is sample output - yours may be different.
```
     50 ./file17.txt
     32 ./file44.txt
     11 ./file72.txt
      5 ./file29.txt
      3 ./file53.txt
```
0

find -maxdepth 1 -type f -exec md5sum '{}' ';' | sort | uniq -c -w 33 | sort -gr | head -n 5 | cut -c1-7,41-

MaDCOw · 2017-02-09 11:36:31 18
PulseAudio: set the volume via command line

Command to raise the volume. From https://wiki.archlinux.org/index.php/PulseAudio#Keyboard_volume_control
This is sample output - yours may be different.
0

pactl set-sink-mute 0 false ; pactl set-sink-volume 0 +5%

MaxLanar · 2017-05-13 13:02:50 17
Compare directories (using cmp to compare files byte by byte) to find files of the same name that differ

Compare the content of the files in the current directory with files of the same name in the duplicate directory. Pop Quiz: You have a duplicate of a directory with files of the same name that might differ. What do you do? You could use diff to compare the directories, but that's boring and it isn't as clever as find -print0 with xargs. Note: You must omit stderr redirect 2>/dev/null to see the list of missing files from DUPDIR, if any. Hint: Redirect stderr to a new file to produce a more readable list of files that are missing from DUPDIR. Warning: This doesn't tell you if DUPDIR contains files not found in the current directory so don't delete DUPDIR. Show Sample Output
This is sample output - yours may be different.
```
./DIFFER.PNG /DUPDIR/./DIFFER.PNG differ: char 59, line 3
cmp: /DUPDIR/./NOMATCH.PNG: No such file or directory
```
0

find . -maxdepth 1 -mindepth 1 -print0 | xargs -0 -n 1 -I % cmp % /DUPDIR/% 2>/dev/null

RiskNerd · 2018-07-08 02:25:57 252
Select to character in visual mode
This is sample output - yours may be different.
0

Vja<character>

minademian · 2018-12-14 11:01:40 28
‹ First < 7 8 9 10 11 >

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Randomly run command

Randomly decide whether to run a command, or fail. It's useful for testing purposes. . Usage: ran PERCENTAGE COMMAND [ARGS] Note: In this version the percentage is required. . This is like @sesom42 and @snipertyler's commands but in a USABLE form. . e.g. In your complicated shell script, put "ran 99" before a crucial component. Now, it will fail 1% of the time allowing you to test the failure code-path. $ ran 99 my_complex_program arg1 arg2

Do a command but skip recording it in the bash command history

Note the extra space before the command (I had to put it as an underscore since the website eats up preceding spaces). That's all it takes. Now if you check your history with "$ history", it wont show up.

Save an HTML page, and covert it to a .pdf file

Uses htmldoc to perform the conversion

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.

convert ascii string to hex

Even adds a newline.

Get the date for the last Saturday of a given month

If your locale has Monday as the first day of the week, like mine in the UK, change the two $7 into $6

cycle through everything sox knows how to read, playing only the first three seconds

I wasted two hours reading the sox documentation and searching on the web for the format of some obscure fscking sound sample, and then finally came up with this. This plays only the first three seconds of your unknown formatted sound file using every one of sox's built-in filetypes. If you don't get an exact match, you may get close. . I could not fit every single type in and keep it under 127 characters, so you will have to replace "..." with the full list obtainable by `$ sox --help` (or try `Show sample output`) . note: /usr/bin/play should be linked to sox on most systems.

positions the mysql slave at a specific master position

say you want to reinitialize the slave database without resetting the master positions. You stop the slave, dump the master database with --master-data=2 then execute the command on the slave and wait for it to stop at the exact position of the dump. reinit the slave db and start the slave. enjoy.

View facebook friend list [hidden or not hidden]

There's no need to be logged in facebook. I could do more JSON filtering but you get the idea... Replace u=4 (Mark Zuckerberg, Facebook creator) with desired uid. Hidden or not hidden... Scary, don't you?

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

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Commands tagged Linux (266) the last day the last week the last month all time sorted by date votes

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Commands tagged Linux (266)

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