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Find dupe files by checking md5sum
This is sample output - yours may be different.
0

find /glftpd/site/archive -type f|grep '([0-9]\{1,9\})\.[^.]\+$'|parallel -n1 -j200% md5sum ::: |awk 'x[$1]++ { print $2 " :::"}'|sed 's/^/Dupe: /g'|sed 's,Dupe,\x1B[31m&\x1B[0m,'

wuziduzi · 2019-10-22 16:02:15 0

Top 10 Memory Processes (reduced output to applications and %usage only)

Top 10 Memory Processes (reduced output to applications and %usage only) Show Sample Output

ps aux | sort -rk 4,4 | head -n 10 | awk '{print $4,$11}'

n0a110w · 2019-10-20 22:52:55 0

Console clock

You will see it on the corner of your running terminal. Show Sample Output
This is sample output - yours may be different.
```
 Sun Oct 20 05:48:44 JST 2019
```
0

while sleep 1; do tput sc; tput cup 0 $(($(tput cols)-29)); date; tput rc; done &

rakibfiha · 2019-10-19 20:50:48 0
Hide or show Desktop Icons on MacOS

Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work
This is sample output - yours may be different.
0

defaults write com.apple.finder CreateDesktop -bool false;killall Finder

vranx · 2019-10-18 12:13:56 0

Print github url for the current url

Works for repos cloned via ssh or https. Show Sample Output

git remote -v | sed -n '/github.com.*push/{s/^[^[:space:]]\+[[:space:]]\+//;s|git@github.com:|https://github.com/|;s/\.git.*//;p}'

bartonski · 2019-10-11 16:50:22 0

List the binaries installed by a Debian package

GNU grep's perl-compatible regular expression(PCRE).
This is sample output - yours may be different.
0

binaries () { dpkg -L "$1" | grep -Po '.*/bin/\K.*'; }

metropolis · 2019-10-05 10:52:15 0
List the binaries installed by a Debian package

This shell function displays a list of binaries contained in an installed package; works on Debian based Linux distributions. Show Sample Output
This is sample output - yours may be different.
```
$ binaries findutils
find
xargs
```
0

binaries () { for f in $(dpkg -L "$1" | grep "/bin/"); do basename "$f"; done; }

lordtoran · 2019-10-05 10:37:51 0
Convert tab separate file (TSV) to JSON with jq

With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 172.16.0.188 i-088dd69e5c3624888 172.16.0.102 i-0e70eac180537d4aa 172.16.0.85 will produce the showed output. Show Sample Output
This is sample output - yours may be different.
```
[
  {
    "id": "i-0b9adca882e5e6326",
    "ip": "172.16.0.188"
  },
  {
    "id": "i-088dd69e5c3624888",
    "ip": "172.16.0.102"
  },
  {
    "id": "i-0e70eac180537d4aa",
    "ip": "172.16.0.85"
  }
]
```
1

cat input.tsv | jq --raw-input --slurp 'split("\n") | map(split("\t")) | .[0:-1] | map( { "id": .[0], "ip": .[1] } )'

nordri · 2019-10-01 10:52:35 0

Top 10 Memory Processes

It displays the top 10 processes sorted by memory usage Show Sample Output

ps aux | sort -rk 4,4 | head -n 10

x3mboy · 2019-09-26 16:37:33 1

edit, view or execute last modified file with a single key-press

Copy this function to command line, press 'Enter' 'f'' 'Enter' to execute (sentence on the left written only for newbies). Hint 'e|x|v|1..9' in front of displayed last modified file name means: "Press 'e' for edit,'x' for execute,'v' for view or a digit-key '1..9' to touch one file from the recent files list to be last modified" and suggested (hidden files are listed too, else remove 'a' from 'ls -tarp' statement if not intended). If you find this function useful you can then rename it if needed and append or include into your ~/.bashrc config script. With the command . ~/.bashrc the function then can be made immediately available. In the body of the function modifications can be made, i.e. replaced joe editor command or added new option into case statement, for example 'o) exo-open $h;;' command for opening file with default application - or something else (here could not be added since the function would exceed 255 chars). To cancel execution of function started is no need to press Ctrl-C - if the mind changed and want to leave simple Enter-press is enough. Once defined, this function can with typeset -f f command be displayed in easy readable form Show Sample Output
This is sample output - yours may be different.
```
knoppix5@kanta:~/SKRIPTE$ f
...
1       rdiff_backup_to_sda3.txt
2       arrange_windows_simple_from_xfce_panel.txt
3       .config.sh
4       arrange_windows.txt
5       read1.sh
6       read3.sh
7       lsb.sh
8       board9.pgn
9       read4.sh
e|x|v|1..9 read4.sh?
```
2

f() { ls -lart;e="ls -tarp|grep -v /|tail -9";j=${e/9/1};g=${e/9/9|nl -nln};h=$(eval $j);eval $g;read -p "e|x|v|1..9 $(eval $j)?" -n 1 -r;case $REPLY in e) joe $h;;v)cat $h;;x) eval $h;;[1-9]) s=$(eval $g|egrep ^$REPLY) && touch "${s:7}" && f;;esac ; }

knoppix5 · 2019-09-26 11:58:37 0

Graphical tree of sub-directories with files

The command finds every item within the directory and edits the output so that subdirectories are and files are output much like the tree command Show Sample Output

find . -print | sed -e 's;[^/]*/;|-- ;g;s;-- |; |;g'

jonavon · 2019-09-25 17:49:35 0

restart Bluetooth from terminal
This is sample output - yours may be different.
0

$ sudo systemctl restart bluetooth

jadnb · 2019-09-23 19:18:56 0
Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)

If your `date` command has `-r` option, you don't need `stat`
This is sample output - yours may be different.
1

cp file{,.$(date -r file "+%y%m%d")}

brx75x · 2019-09-19 09:42:38 0
Write a bootable Linux .iso file directly to a USB-stick

Writes hybrid ISO directly to USB stick; replace /dev/sdb with USB device in question and the ISO image link with the link of your choice
This is sample output - yours may be different.
0

wget -O /dev/sdb https://cdimage.ubuntu.com/daily-live/current/eoan-desktop-amd64.iso

realkstrawn93 · 2019-09-19 04:03:13 0
Check difference between two file directories recursively
This is sample output - yours may be different.
3

diff <(tree /dir/one) <(tree /dir/two)

redraw · 2019-09-19 01:33:08 1
Bitcoin Brainwallet Private Key Calculator
This is sample output - yours may be different.
1

(read -r passphrase; b58encode 80$( brainwallet_exponent "$passphrase" )$( brainwallet_checksum "$passphrase" ))

Jacki188 · 2019-09-15 21:31:52 0
Rsync using SSH and outputing results to a text file

--delete will delete copies on remote to match local if deleted on local --stats will output the results -z zip -a archive -A preserve ACL -x don't cross filesystem boundaries -h human readable -e specify the remote shell to use
This is sample output - yours may be different.
2

rsync --delete --stats -zaAxh -e ssh /local_directory/ username@IP_of_remote:/Remote_Directory/ > /Text_file_Directory/backuplog.txt

chicagonpg · 2019-09-10 21:00:29 0
Get a list of stale AWS security groups

AWS provides a method to audit for obsolete AWS security groups. From their documentation: "Describes the stale security group rules for security groups in a specified VPC. Rules are stale when they reference a deleted security group in a peer VPC, or a security group in a peer VPC for which the VPC peering connection has been deleted." Show Sample Output
This is sample output - yours may be different.
```
aws ec2 describe-stale-security-groups --vpc-id vpc-cafebabe
{
    "StaleSecurityGroupSet": []
}
aws ec2 describe-stale-security-groups --vpc-id vpc-babebabe123414
{
    "StaleSecurityGroupSet": []
}
aws ec2 describe-stale-security-groups --vpc-id vpc-095ce7acd7e772170
{
    "StaleSecurityGroupSet": []
}
aws ec2 describe-stale-security-groups --vpc-id vpc-face1358
{
    "StaleSecurityGroupSet": []
}
```
0

aws ec2 describe-vpcs --query 'Vpcs[*].VpcId' --output text |xargs -t -n1 aws ec2 describe-stale-security-groups --vpc-id

vocatan · 2019-09-09 18:54:08 0
Create backup copy of file, adding suffix of the date of the file modification (NOT today's date)
This is sample output - yours may be different.
1

cp file{,.$(date -d @$(stat -c '%Y' file) "+%y%m%d")}

rgawenda · 2019-09-09 11:49:28 0
Perform Real-time Process Monitoring Using Watch Utility
This is sample output - yours may be different.
6

watch -n 1 'ps -eo pid,ppid,cmd,%mem,%cpu --sort=-%mem | head'

wuziduzi · 2019-09-08 06:06:08 0
Rotate a video file by 90 degrees CW

Change video orientation in metadata only
This is sample output - yours may be different.
1

ffmpeg -i in.mov -c copy -metadata:s:v:0 rotate=90 out.mov

unixmonkey100988 · 2019-09-07 08:16:33 0
nmap get all active online ips from specific network

scan whole specific network for active online ips Show Sample Output
This is sample output - yours may be different.
```
192.168.1.79
192.168.1.82
192.168.1.83
192.168.1.84
192.168.1.86
192.168.1.87
192.168.1.89
192.168.1.94
192.168.1.97
192.168.1.100
192.168.1.101
192.168.1.104
192.168.1.110
192.168.1.119
192.168.1.120
```
5

nmap -n -sn 192.168.1.0/24 -oG - | awk '/Up$/{print $2}'

aysadk · 2019-09-04 13:31:53 0

Show whats going on restoring files from a spectrum protect backup

spectrum protect's dsmc command shows file names and total amount of restore. This command shows which files are actually open and their siz in GB and highlights the change to the previous output Show Sample Output

watch -n60 -d 'lsof -w /filesysname|grep -v NAME|awk '\''{$7=int($7/1073741824) " GB"; print $7, $9}'\'''

BodoGreif · 2019-09-02 11:49:20 0

Rotate a video file by 90 degrees CW

Transpose parameter: 0 = 90CounterCLockwise and Vertical Flip (default) 1 = 90Clockwise 2 = 90CounterClockwise 3 = 90Clockwise and Vertical Flip
This is sample output - yours may be different.
-1

ffmpeg -i in.mov -vf "transpose=1" out.mov

malathion · 2019-09-02 04:54:31 0
Get your public IP address using Amazon
This is sample output - yours may be different.
0

curl checkip.amazonaws.com

luissquall · 2019-08-29 23:12:41 0
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What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Unlock more space form your hard drive

This command changes the reserved space for privileged process on '/dev/sda' to 1 per cent.

Prepend a text to a file.

Using the sed -i (inline), you can replace the beginning of the first line of a file without redirecting the output to a temporary location.

diff two unsorted files without creating temporary files

bash/ksh subshell redirection (as file descriptors) used as input to diff

Convert diff output to HTML ins/del

Diff files over SSH

Sometimes you need to compare two config files on different servers. Put the file names into the above script and let 'er rip.

Calculate days on which Friday the 13th occurs (inspired from the work of the user justsomeguy)

Friday is the 5th day of the week, monday is the 1st. Output may be affected by locale.

Create a 5 MB blank file via a seek hole

Similar to the original, but is much faster since it only needs to write the last byte as zero. A diff on testfile and testfile.seek will return that they are the same.

Fibonacci numbers with awk

Another combination of seq and awk. Not very efficient, but sufficiently quick.

Find out how old a web page is

I used to use the Firefox "View page info" feature a lot to determine how stale the web page I was looking at was. Now that I use mostly Chrome I miss that feature, so here is a command line alternative using wget. The -S says to display the server response, the --spider says to not download any files/pages, just fetch the header. The output goes to stderr, so to grep it you use 2>&1 to combine the stderr stream with stdout, the pipe that to grep for Last-Modified. You can use curl instead if you have it installed, like this: $ curl --head -s http://osswin.sourceforge.net | grep Mod

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"

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