Commands by swarzynski

Commands by swarzynski (19)

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List all packages in Ubuntu/Debian that no package depends on
This is sample output - yours may be different.
0

dpkg-query --show --showformat='${Package}\t${Status}\n' | tac | awk '/installed$/ {print $1}' | xargs apt-cache rdepends --installed | tac | awk '{ if (/^ /) ++deps; else if (!/:$/) { if (!deps) print; deps = 0 } }'

swarzynski · 2022-09-29 07:55:16 50
Find non ascii characters in files in folder
This is sample output - yours may be different.
2

find . -type f -regex '.*\.$cpp\|h$' -exec grep -Pl "[\x80-\xFF]" {} \; | xargs -I % bash -c 'echo "%"; grep --color='auto' -P -n "[\x80-\xFF]" "%"'

swarzynski · 2022-08-02 11:47:59 409
Convert indentation to tabs
This is sample output - yours may be different.
-1

find . -type f -regex '.*\.$cpp\|h$' -exec bash -c 'unexpand -t 4 --first-only "$0" | sponge "$0"' {} \;

swarzynski · 2022-08-02 10:16:47 268
Change Windows line endings to Unix version

https://www.howtogeek.com/771399/how-to-use-the-find-command-in-linux/
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec egrep -l $'\r'\$ {} \; | xargs dos2unix

swarzynski · 2022-08-02 09:28:38 377
Download audio from youtube video
This is sample output - yours may be different.
0

yt-dlp -f 'ba' -x --audio-format mp3 https://www.youtube.com/watch?v=1La4QzGeaaQ -o '%(id)s.%(ext)s'

swarzynski · 2022-06-19 20:52:35 238
Add temporary <1m entries to old cron

Old cron doesn't allow periods
This is sample output - yours may be different.
1

for i in $( seq 0 5 55 ); do (crontab -l ; echo "* * * * * sleep $i; date >> ~/log.txt") | crontab -; done

swarzynski · 2022-04-04 09:56:40 200
Convert records in columns to csv
This is sample output - yours may be different.
2

awk '{print $3,$2,$1}' RS="\n\n" FS="\n" OFS="," filename.txt

swarzynski · 2022-03-08 17:58:32 128
Remove metadata from pdf file (e.g. creation date)
This is sample output - yours may be different.
0

qpdf --pages source.pdf 1-z -- --empty clean-file.pdf

swarzynski · 2022-01-12 08:10:32 200
Change dates/timestamps of all files in the current folder
This is sample output - yours may be different.
-1

gci -rec | %{ $_.lastWriteTime = ($_.lastAccessTime = ($_.creationTime = (get-date "2021-05-19T10:14:00"))) }

swarzynski · 2022-01-12 08:08:40 182
Find non-ASCII and UTF-8 files in the current directory
This is sample output - yours may be different.
1

find . -type f -regex '.*\.$cpp\|h$' -exec file {} \; | grep "UTF-8\|extended-ASCII"

swarzynski · 2020-09-15 09:10:02 155
Replace lines in files with only spaces/tabs with simple empty line (within current directory - recursive)
This is sample output - yours may be different.
0

find . -type f -regex '.*\.$cpp\|h$' -exec sed -i 's/^[[:blank:]]\+$//g' {} \;

swarzynski · 2020-09-15 09:07:08 90
Make mirror of ftp directory
This is sample output - yours may be different.
0

wget -m --ftp-user=root --ftp-password=pass -A "*.csv" -nd -P "dirname" ftp://46.46.46.46/../mnt/sd/

swarzynski · 2016-08-31 10:59:07 2230
Resize all images in folder
This is sample output - yours may be different.
0

mogrify -resize 25% *.jpg

swarzynski · 2016-06-10 18:14:08 4
Check syntax of remote ruby file
This is sample output - yours may be different.
1

wget --quiet 'https://raw.githubusercontent.com/rahult/books/master/well_grounded_rubyist/threads/rps.rb' - | ruby -c

swarzynski · 2016-02-18 11:14:55 6
Copy all files in subfolders to one folder
This is sample output - yours may be different.
0

find . -type f -exec cp '{}' /path/to/all/folder \;

swarzynski · 2015-12-17 18:04:40 4
Search for files with non-Unix line endings
This is sample output - yours may be different.
0

egrep -l $'\r'\$ *

swarzynski · 2015-11-19 10:57:47 4
Run 'tail' on selected files in current directory
This is sample output - yours may be different.
0

for i in *.csv; do tail $i; done

swarzynski · 2015-11-19 10:07:59 4
Merge files in current directory
This is sample output - yours may be different.
0

find . -type f -name '*.csv' -exec cat {} + >> merged.csv

swarzynski · 2015-11-19 10:06:21 4
Rename selected files in the directory using ruby
This is sample output - yours may be different.
0

ruby -e 'Dir.glob("*.txt") { |f| File.rename(f,f.gsub("_t","")) }'

swarzynski · 2015-11-19 09:59:47 7

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Recursively remove .svn directories

Print just line 4 from a textfile

Prints the 4th line and then quits. (Credit goes to flatcap in comments: http://www.commandlinefu.com/commands/view/6031/print-just-line-4-from-a-textfile#comment.)

vi a remote file with port

If you are running sshd on different port use above this command to edit/view remote file with vi/vim. In above example I am using port 12345.

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" }

find duplicate processes

This command will allow to search for duplicate processes and sort them by their run count. Note that if there are same processes run by different users you'll see only one user in the result line, so you'll need to do: $ ps aux | grep to see all users that run this command.

32 bits or 64 bits?

Easy and direct way to find this out.

Sort and count subjects of emails stuck in Exim queue

Be notified about overheating of your CPU and/or motherboard

You'll be notified if your core 1 temperature exceeds 50 degrees, you can change the monitored device by editing the "Core 1" or change the critical temperature by editing the "-gt 50" part. Note: you must have lm-sensors installed and configured in order to get this command working.

processes per user counter

No need for sort

Downsample mp3s to 128K

This will lower the quality of mp3 files, but is necessary to play them on some mobile devices.

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