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Calculate days on which Friday the 13th occurs

I removed the dependency of the English language Show Sample Output

for y in $(seq 1996 2018); do echo -n "$y -> "; for m in $(seq 1 12); do NDATE=$(date --date "$y-$m-13" +%w); if [ $NDATE -eq 5 ]; then PRINTME=$(date --date "$y-$m-13" +%B);echo -n "$PRINTME "; fi; done; echo; done

ginochen · 2018-06-25 09:20:57 1

Adding Prefix to File name
This is sample output - yours may be different.
2

for i in *.pdf; do mv "$i" CS749__"$i"; done

ialmaescura · 2018-06-18 18:57:26 0
Sort files in folders alphabetically

Creates one letter folders in the current directory and moves files with corresponding initial in the folder.
This is sample output - yours may be different.
2

for i in *; do I=`echo $i|cut -c 1|tr a-z A-Z`; if [ ! -d "$I" ]; then mkdir "$I"; fi; mv "$i" "$I"/"$i"; done

z3bu · 2018-06-29 11:37:04 0
Generate Random Text based on Length
This is sample output - yours may be different.
1

genRandomText() { local n=$1; while [ $((n--)) -gt 0 ]; do printf "\x$(printf %x $((RANDOM % 26 + 65)))" ; done ; echo ; }

ginochen · 2018-06-27 01:04:45 0

Bash Dialog

The dialog utility is used to create a basic level graphical user interface. We can use this in Shell script to create very useful programs. Show Sample Output

This is sample output - yours may be different.

? #!/bin/bash                                                                                                                                   ?
? color_code="\e[93m"                                                                                                                           ?
? function d_container {                                                                                                                        ?
?   echo "t"                                                                                                                                    ?
? }                                                                                                                                             ?
? function d_images {                                                                                                                           ?
?   echo "t"                                                                                                                                    ?
? }                                                                                                                                             ?
? function d_search {                                                                                                                           ?
?   clear                                                                                                                                       ?
?   read keyword                                                                                                                                ?
?   docker search $keyword                                                                                                                      ?
? }                                                                                                                                             ?
? function d_install {                                                                                                                          ?
?   apt install docker.io                                                                                                                       ?
?   echo "[OK] Docker ?nstalled"                                                                                                                ?
? }                                                                                                                                             ?
? function d_remove {                                                                                                                           ?
?   apt remove docker* --purge                                                                                                                  ?
?   echo "[OK] Docker Removed"                                                                                                                  ?
?   exit                                                                                                                                        ?
? }                                                                                                                                             ?
? function d_start {                                                                                                                            ?
?   clear                                                                                                                                       ?
?   service docker start                                                                                                                        ?
?   echo "[OK] Docker Started"                                                                                                                  ?
??????(+)???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????24%??????
?                                                                   <ÇIKI?>                                                                     ?

dialog --textbox dock.sh 50 1000

kalilinuxtr · 2018-07-06 12:51:48 0

Monitor ElasticSearch cluster health - Useful for keeping an eye on ES when rebalancing takes place
This is sample output - yours may be different.
0

watch -n 1 curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'

jmarek · 2018-06-17 15:58:39 0
Estimate an economic bitcoin-cli fee and display as sat/B with date time stamp

Compactly display a bitcoin-cli fee estimate in satoshis/Byte, sat/B, date time stamp. Change the 6 to the desired number of confirmations. Display in btc/KB unit of measure: printf %g "$(bccli estimatesmartfee 6 "ECONOMICAL" | jq .feerate)";printf " btc/KB estimated feerate for 6 confirmations\nMultiply by 100,000 to get sat/B\n"; Two settings for estimate mode are "ECONOMICAL". "CONSERVATIVE" is the same as "UNSET" # jq is a json filter. sudo apt-get install jq Show Sample Output
This is sample output - yours may be different.
```
163.808 sat/B estimated feerate for 6 confirmations as of Wed 20 Jun 2018 07:19:14 AM MDT
Divide by 100,000 to get btc/KB
```
0

printf %g "$(bitcoin-cli estimatesmartfee 6 "ECONOMICAL" | jq .feerate*100000)";printf " sat/B estimated feerate for 6 confirmations as of $(date +%c)\nDivide by 100,000 to get btc/KB\n"

deinerson1 · 2018-06-20 13:40:32 0
Count all [space][new line][space][new line] pattern using grep

Using to count all sentences in CoNLL data format
This is sample output - yours may be different.
0

echo $(( $(grep -c '^ $' file_name) / 2 ))

hiepdev · 2018-06-28 11:31:14 0
escape quotes, strip newlines, tabs and spaces from JSON
This is sample output - yours may be different.
0

sed 's/\"/\\\"/g' json_file | tr -d '\n' | tr -d '[[:blank:]]'

jgleeson · 2018-07-05 10:58:47 0
Compute the average number of KB per file for each dir

Shorter version using --tag
This is sample output - yours may be different.
0

parallel --tag echo '$(du -s {} | awk "{print \$1}") / $(find {} | wc -l)' \| bc -l ::: *

IndustrialJoe · 2018-07-05 18:33:21 0
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 0
Calculate days on which Friday the 13th occurs

Alter the years in the first brace expansion to select your year range. Modify date format to your liking but leave " %w" at the end. Show Sample Output
This is sample output - yours may be different.
```
2018 April
2018 July
2019 September
2019 December
2020 March
2020 November
2021 August
2022 May
```
0

for i in {2018..2022}-{01..12}-13; do date --date $i +"%Y %B %w" | sed '/[^5]$/d; s/ 5*$//'; done

justsomeguy · 2018-07-09 15:47:39 0
route add default gateway
This is sample output - yours may be different.
0

ip route add default via 192.168.2.1 dev ens33

kdetony · 2018-07-10 17:55:25 0
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. Show Sample Output
This is sample output - yours may be different.
```
2018-04-13 Friday the 13th
2018-07-13 Friday the 13th
2019-09-13 Friday the 13th
2019-12-13 Friday the 13th
2020-03-13 Friday the 13th
2020-11-13 Friday the 13th
2021-08-13 Friday the 13th
2022-05-13 Friday the 13th
2023-01-13 Friday the 13th
2023-10-13 Friday the 13th
2024-09-13 Friday the 13th
2024-12-13 Friday the 13th
2025-06-13 Friday the 13th
```
0

for i in {2018..2025}-{01..12}-13; do [[ $(date --date $i +"%u" | grep 5) != 5 ]] || echo "$i Friday the 13th"; done

test666v2 · 2018-07-10 21:31:02 1

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Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

Find broken symlinks and delete them

recursively deletes all broken symlinks using zsh globbing syntax.

Insert the last argument of the previous command

list block devices

Shows all block devices in a tree with descruptions of what they are.

USE WITH CAUTION: perminately delete old kernel packages

Draw kernel module dependancy graph.

parse "lsmod" output to "dot" format and pass it to "display". Without perl!

Find name of package which installed a given shell command

Some command names are very different from the name of the package that installed them. Sometimes, you may want to find out the name of the package that provided a command on a system, so that you can install it on another system.

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"

Start dd and show progress every X seconds

make computer speaking to you :)

you can listen to your computer, but don't be carried away

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All commands (14)

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