All commands (14,029)
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For each *.jpg or *.JPG file in the current directory, extract the date the photo was taken from its EXIF metadata. Then replace the date stamp, which is assumed to exist in the filename, by the date the photo was taken. A trick from https://unix.stackexchange.com/a/9256 is used to split the date into its components. Show Sample Output
1(IFS=': '; for i in *.(#i)jpg; do set $(exiv2 -K 'Exif.Image.DateTime' -Pv $i 2> /dev/null); mv -v $i "$1-$2-$3${i#[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]}"; done) -
Generates a TV noise alike output in the terminal. Can be combined with https://www.commandlinefu.com/commands/view/9728/make-some-powerful-pink-noise
6while true;do printf "$(awk -v c="$(tput cols)" -v s="$RANDOM" 'BEGIN{srand(s);while(--c>=0){printf("\xe2\x96\\%s",sprintf("%o",150+int(10*rand())));}}')";done -
Check if port is open, if you don't have ncat on your machine. Show Sample Output
6echo > /dev/tcp/127.0.0.123/8085 && echo "Port is open" -
0strace 2>&1 geany |grep geany.conf
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This is similar to standard `pv`, but it retains the rate history instead of only showing the current rate. This is useful for spotting changes. To do this, -f is used to force pv to output, and stderr is redirected to stdout so that `tr` can swap the carriage returns for new lines. (doesn't work correctly is in zsh for some reason. Tail's output isn't redirected to /dev/null like it is in bash. anyone know why? ???????) Show Sample Output
1tail -f access.log | pv -l -i10 -r -f 2>&1 >/dev/null | tr /\\r \ \\n -
After typing the command below, you will be greeted with nothing. press the up arrow to find the previous command you typed, press enter. repeat this as many times as you need, then hit CTRL-Z and press enter to save to the 'batchfilename.bat' file.
1copy con batchfilename.bat -
Removes the annoying filehistory filename default of adding a really long UTC time and date string to every single file. Non recursive so you will have to run this per directory.
0Get-ChildItem -Recurse | Where-Object { $_.Name -match " ?\(\d\d\d\d_\d\d_\d\d \d\d_\d\d_\d\d UTC\)" } | Rename-Item -NewName { $_.Name -replace " ?\(\d\d\d\d_\d\d_\d\d \d\d_\d\d_\d\d UTC\)", ""} -
Useful for Roku which does not support 7.1. Useful resources: - https://trac.ffmpeg.org/wiki/Map - https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio - https://superuser.com/questions/852400/properly-downmix-5-1-to-stereo-using-ffmpeg
0ffmpeg -i in.mkv -map 0 -c copy -c:a:0 aac -ac:a:0 6 out.mkv -
The “predictive capture” feature of Sony's Xperia camera app hides the date stamp deeply inside the filename. This command adds another date stamp at the beginning of the filename. Show Sample Output
0(setopt CSH_NULL_GLOB; cd /path/to/Camera\ Uploads; for i in DSCPDC_000*; do mv -v $i "$(echo $i | perl -lpe 's/(DSCPDC_[0-9]{4}_BURST)([0-9]{4})([0-9]{2})([0-9]{2})/$2-$3-$4 $1$2$3$4/')"; done) -
Sony's Xperia camera app creates files without time-stamped names. Thus, after deleting files on the phone, the same names will be reused. When uploading the photos to a cloud storage, this means that files will be overwritten. Running this command after every sync of uploaded photos with the computer prevents this. Show Sample Output
1(setopt CSH_NULL_GLOB; cd /path/to/Camera\ Uploads; for i in DSC_* MOV_*; do mv -v $i "$(date +%F -d @$(stat -c '%Y' $i)) $i"; done) -
List SAN Domains for a certificate Show Sample Output
0echo | openssl s_client -connect google.com:443 2>&1 | openssl x509 -noout -text | awk -F, -v OFS="\n" '/DNS:/{x=gsub(/ *DNS:/, ""); $1=$1; print $0}' -
You can get an approximate idea of how long your data export might take. Show Sample Output
0mysqldump --login-path=mypath sbtest sbtest4 | pv --progress --size 200m -t -e -r -a > dump.sql -
Will delete empty directories and sub-directories (hideen too = whose names are starting with dot .). Used 'rm' command instead of 'rmdir' to give the possibility of asking for confirmation before deleting i.e. it is not wise do delete all empty directories in /etc folder. Replace dot in 'find .' with any for other starting directory instead of current. in 'rm -i -R' 'i' stands for ask before delete and 'R' for delete folder recursively or folder itself if it is empty
0find . -type d -empty -exec rm -i -R {} \; -
I can think of using this command after compiling an downloaded source from anywhere as an easy way to find all executable products. We usually issue the
findcommand (without arguments) to list the full paths of all directories and sub-directories and files in the entire current tree. Similar command istree -aicfnF1find -executable -type f -
Run inside Command Prompt (cmd.exe) as admin. Note that you must close explorer.exe first, and even so some files will not be deleted, will say "Access is denied." To definitely delete them enter with another admin user or from other operating system and access the drive. Show Sample Output
1DEL /F /S /Q /A %LocalAppData%\Microsoft\Windows\Explorer\thumbcache_*.db -
Sometimes we install programs, we forget about them, and they stay there wasting RAM. This one-liner try to find them. Show Sample Output
0ps -eo cmd | awk '{print $1}'| sort -u | grep "^/" | xargs dpkg -S 2>/dev/null | awk -F: '{print $1}' | sort -u | xargs apt-mark showmanual -
raw image created by canon digital camera. Install using apt-get install ufraw
0for i in *.CR2; do ufraw-batch $i --out-type=jpeg --output $i.jpg; done; -
3bc -l <<< "scale=1000; 4*a(1)"
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tar(1) and cpio(1) are not fully platform agnostic, although their file formats are specified in POSIX.1-2001. As such, GNU tar(1) might not be able to extract a BSD tar(1) archive, and ivce versa. pax(1) is defined in POSIX.1-2001. To extract an archive:
pax -rf archive.tar2pax -wf archive.tar /path -
0& 'C:\cwRsync_5.5.0_x86_Free\bin\rsync.exe' --force --ignore-errors --no-perms --chmod=ugo=rwX --checksum --delete --backup --backup-dir="_EVAC/$(Get-Date -Format "yyyy-MM-dd-HH-mm-ss")" --whole-file -a -v "//MyServer/MyFolder" "/cygdrive/c/Backup"
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0strace -c -p $(pidof -s mysqld) -f -e trace=all
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cron entry to record mysql status every minute
0mysqladmin status >> /home/status.txt 2>> /home/status_err.txt -
username is dba and password is dba123
0grant all on *.* to 'dba'@'localhost' identified by 'dba123' with grant option; -
remove all compressed files in /home/ folder not created in the last 10 days
1find /home -type f \( -name "*.sql.gz" -o -name "*.tar.gz" -mtime +10 \) -exec rm -rf {} \; -
remove all files in /home/ folder that starts with bk_all_dbProdSlave and not created in the last 2 days
0find /home/ -name bk_all_dbProdSlave_\* -mtime +2 -exec rm -f {} \; - < 1 2 3 4 > Last ›
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