bashoneliners.com

Welcome to bashoneliners.com, a growing collection of practical and well-explained Bash one-liners, snippets, tips and tricks. We review and improve every contributed one-liner to make sure it is of high quality: useful, easy to read, follows best practices, with clear, detailed, accurate explanation. These one-liners should help you automate tasks, troubleshoot problems, whether it be in system administration, file management, networking or programming.

0

Watch a mashup of many video files

L=5; while true; do; readarray -t paths < <(find . -type f -print | shuf -n 1); for i in "${!paths[@]}"; do; path=${paths[i]}; if ffprobe -i "$path" -show_entries format=duration -v quiet -of csv="p=0" > /dev/null; then; N=$(ffprobe -i "$path" -show_entries format=duration -v quiet -of csv="p=0"); D=${N%.*}; P=$((D / 100 * 25)); R=$((1 + RANDOM % D - P * 2)); S=$((P + RANDOM % R)); W=$((R / 4)); LEN=$((1 + RANDOM % L)); mpv "$path" --start="$S" --length="$LEN" --fs &> /dev/null; W=$(bc <<< "$LEN - 0.5"); sleep "$W"; unset 'paths[i]'; fi; done; done

July 6, 2023krypniok

2

Report disk usage by file type

find . -type f -empty -prune -o -type f -printf "%s\t" -exec file --brief --mime-type '{}' \; | awk 'BEGIN {printf("%12s\t%12s\n", "bytes", "type")} {type = $2; a[type] += $1} END {for (i in a) printf("%12u\t%12s\n", a[i], i) | "sort -nr"}'

December 28, 2020joeashcraft

1

Use inverted conditions with the find command

find . -type f -not -name '*.mp3'

November 23, 2020sandreas

1

Recursively remove all "node_modules" folders

find . -name node_modules -exec rm -rf {} +

March 29, 2020tg-z

2

Find directories modified between two dates

find . -type d -newermt "2019-01-01" ! -newermt "2019-02-01" -exec ls -ld {} \;

May 20, 2019fenchu

1

Count the total number of hours of your music collection

find . -print0 | xargs -0 -P 40 -n 1 sh -c 'ffmpeg -i "$1" 2>&1 | grep "Duration:" | cut -d " " -f 4 | sed "s/.$//" | tr "." ":"' - | awk -F ':' '{ sum1+=$1; sum2+=$2; sum3+=$3; sum4+=$4; if (sum4 > 100) { sum3+=1; sum4=0 }; if (sum3 > 60) { sum2+=1; sum3=0 }; if (sum2 > 60) { sum1+=1; sum2=0 } if (NR % 100 == 0) { printf "%.0f:%.0f:%.0f.%.0f\n", sum1, sum2, sum3, sum4 } } END { printf "%.0f:%.0f:%.0f.%.0f\n", sum1, sum2, sum3, sum4 }'

March 1, 2019pingiun

0

Store the output of find in an array

mapfile -d $'\0' arr < <(find /path/to -print0)

February 18, 2019bashoneliners

4

Find all log files modified 24 hours ago, and zip them

find . -type f -mtime +1 -name "*.log" -exec zip -m {}.zip {} \; >/dev/null

November 9, 2018TrongTan124

8

List status of all Git repositories

find ~ -type d -name .git | sed 's?/\.git$??' | awk '{ print "-------------------------"; print "\033[1;32mGit Repo:\033[0m " $0; system("git --git-dir=\""$0"\"/.git --work-tree=\""$0"\" status")}'

October 16, 2016uMt

4

Change the encoding of all files in a directory and subdirectories

find . -type f  -name '*.java' -exec sh -c 'iconv -f cp1252 -t utf-8 "$1" > converted && mv converted "$1"' -- {} \;

November 20, 2014bashoneliners

1

Delete orphan vi and vim undo files

find . -type f -iname '*.un~' | while read UNDOFILE ; do FILE=$( echo "$UNDOFILE" | sed -r -e 's/.un~$//' -e 's&/\.([^/]*)&/\1&' ) ; [[ -e "$FILE" ]] || rm "$UNDOFILE" ; done

September 2, 2014rafaeln

2

Find recent logs that contain the string "Exception"

find . -name '*.log' -mtime -2 -exec grep -Hc Exception {} \; | grep -v :0$

July 19, 2014bashoneliners

3

Find all files recursively with specified string in the filename and output any lines found containing a different string

find . -name '*conf*' -exec grep -Hni 'text to match' {} \; > matches.txt

April 14, 2014n00tz

2

Remove .DS_Store from the repository you happen to staging by mistake

find . -name .DS_Store -exec git rm --ignore-unmatch --cached {} +

February 22, 2014Kuwana

0

Check if a file exists and has a size greater than X

[[ $(find /path/to/file -type f -size +51200c 2>/dev/null) ]] && echo true || echo false

January 9, 2014bashoneliners

0

Find files that are not executable

find /some/path -type f ! -perm -111 -ls

September 18, 2013bashoneliners

1

Md5sum the last 5 files in a folder

find /directory1/directory2/ -maxdepth 1 -type f | sort | tail -n 5 | xargs md5sum

August 21, 2013openiduser113

1

Find distinct file extensions in a folder

find . -type f | perl -ne 'print $1 if /\.([^.\/]+)$/' | sort -u

May 17, 2013kowalcj0

2

Unhide all hidden files in the current directory.

find . -maxdepth 1 -type f -name '\.*' | sed -e 's,^\./\.,,' | sort | xargs -iname mv .name name

April 25, 2013openiduser93

0

Print file owners and permissions of a directory tree

find /path/to/dir1 -printf "%U %G %m %p\n" > /tmp/dir1.txt

March 19, 2013bashoneliners

1

Get only the latest version of a file from across mutiple directories.

find . -name 'filename' | xargs -r ls -tc | head -n1

March 7, 2013Anntoin

0

Get only the latest version of a file from across mutiple directories

find . -name custlist\* | perl -ne '$path = $_; s?.*/??; $name = $_; $map{$name} = $path; ++$c; END { print $map{(sort(keys(%map)))[$c-1]} }'

February 23, 2013bashoneliners

1

Replace the header of all files found.

find . -type f -name '*.html' -exec sed -i -e '1r common_header' -e '1,/STRING/d' {} \;

October 25, 2012jam

0

Execute different commands with find depending on file type

find /path/to/dir -type d -exec chmod 0755 '{}' \; -o -type f -exec chmod 0644 '{}' \;

June 17, 2012bashoneliners

0

Replace symlinks with the actual files they are pointing at

find /path/to/dir -type l -exec sh -c 'cp --remove-destination "$(readlink "{}")" "{}"' \; 

April 24, 2012bashoneliners