Convert all wav files to flac files in a folder
for i in *.wav; do ffmpeg -i "$i" "$i".flac ; done
for f in *.flac; do flac -cd "$f" | lame -b 320 - "${f%.*}".mp3; done
for i in *.mp4; do ffmpeg -i "$i" -vcodec libx265 -crf 28 "${i%.*}_compressed.mp4"; done
for i in *.mov; do ffmpeg -i "$i" -vcodec libx265 -crf 28 "${i%.*}_compressed.mp4"; done
sudo apt install libheif-examples for file in *.heic; do heif-convert "$file" "${file/%.heic/.jpg}"; done
totem "$(ls -R | shuf -n1)"
gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/default \ -dNOPAUSE -dQUIET -dBATCH -dDetectDuplicateImages \ -dCompressFonts=true -r150 -sOutputFile=output.pdf input.pdf
After upgrading to Ubuntu 22.04 I had some issue to read some video files (Totem crash at startup, display the error “The specified movie could not be found” or open the video with a strange format. I did install the Intel non-free drivers to solve this issue:
sudo apt install intel-media-va-driver-non-free ubuntu-restricted-extras
# remove lrc files find -type f -name "*.lrc" -delete # remove .DS_Store files find -type f -name ".DS_Store" -delete
fdupes -rdN .
tar -zxvf file.tar.gz
tar -xvjf file.tar.bz2
find . -type d -delete
find . -iname "*.mp3" -print
curl -4 -o /dev/null http://bouygues.testdebit.info/100M.iso
curl -o /tmp/temp.iso https://bouygues.testdebit.info/100M.iso curl -4 -o /dev/null -F "filecontent=@/tmp/temp.iso" http://bouygues.testdebit.info
host myip.opendns.com resolver1.opendns.com
sudo netstat -antp
who
sudo slay user_name
sudo ufw status verbose
sudo iftop -i enp9s0
ssh user@host -XC application
ftpasswd --passwd --name=bob --uid=1001 --home=/home/bob --shell=/bin/false
ncftp -u username -p apssword ftp://ftpperso.free.fr/dir/
sudo ncftpput -R -u username ftpperso.free.fr / /dir_to_copy/*
sudo lshw | more
sudo dmidecode
sudo lscpu
upower -i /org/freedesktop/UPower/devices/battery_BAT0
wavemon
sudo glances --enable-plugin sensors
cpufreq-info
sudo journalctl --since "2023-01-01" | grep temperature
sudo powertop
sudo chkrootkit
sudo gt5
//check current kernel uname -r //check if list of old kernels is correct dpkg -l linux-{image,headers}-"[0-9]*" | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e '[0-9]' //purge old kernels dpkg -l linux-{image,headers}-"[0-9]*" | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e '[0-9]' | xargs sudo apt-get -y purge
sudo smartctl -A /dev/sda
sudo hdparm -y /dev/sdb
sudo hdparm -C /dev/sdb
sudo hdparm -B /dev/sdb
60 = 5×60 = (5 minutes)
sudo hdparm -B60 /dev/sdb
Install cifs/nfs
sudo apt install nfs-common sudo apt install cifs-utils
brsaneconfig4 -a name=(name your device) model=(model name) ip=xx.xx.xx.xx
Get SSH banned IP
fail2ban-client status sshd
tail -f access.log | goaccess -
goaccess access.log
zcat -f access.log* | goaccess -
sed -n '/'$(date '+%d\/%b\/%Y' -d 'last week')'/,$ p' access.log | goaccess -a - sed -n '/'$(date '+%d\/%b\/%Y' -d 'last month')'/,$ p' access.log | goaccess -a - sed -n '/'$(date '+%d\/%b\/%Y' -d '1 month ago')'/,$ p' access.log | goaccess -a - sed -n '/'$(date '+%d\/%b\/%Y' -d '1 week ago')'/,$ p' access.log | goaccess -a - sed -n '/'$(date '+%d\/%b\/%Y' -d 'yesterday')'/,$ p' access.log | goaccess -a - sed -n '/'$(date '+%d\/%b\/%Y' -d 'today')'/,$ p' access.log | goaccess -a -
goaccess access.log -o /var/www/html/report.html --log-format=COMBINED --real-time-html
awk '{print $9}' access.log | sort | uniq -c | sort -rn
cd /var/log/nginx/ awk '($9 ~ /404/)' access.log | awk '{print $7}' | sort | uniq -c | sort -rn
awk -F\" '($2 ~ /\.(jpg|gif)/ && $4 !~ /^https:\/\/eolienne\.f4jr\.org/){print $4}' access.log | sort | uniq -c | sort
awk '/Jan\/2024/ {print $1};' access.log | sort | uniq -c | sort -rn | head -20
awk 'BEGIN{ PROCINFO["sorted_in"]="@val_num_desc" } { a[$1]++; b[$1]+=$10 } END{ for(i in a) { if(++c>10) break; printf "IP: %s: ",i ; system(sprintf("numfmt --to=iec-i %s",b[i])) ; } }' access.log
sudo /usr/bin/mysql_secure_installation
sudo mysql -uroot -p GRANT LOCK TABLES, SELECT, RELOAD ON *.* TO 'backup'@'localhost' IDENTIFIED BY 'PASSWORD';
/etc/mysql/conf.d/mysqldump.cnf
mysql -p -u root CREATE DATABASE db_name; GRANT ALL PRIVILEGES ON db_name.* TO 'db_user'@'localhost' IDENTIFIED BY 'password' WITH GRANT OPTION;
mysql -p -u root -D db_name
SHOW TABLES ;
Installation of Airplay in Ubuntu 22.04 with Pulse Audio
# Airplay ability sudo apt install pulseaudio build-essential paprefs git pulseaudio-module-raop intltool libjack0 pavucontrol pulseaudio-module-zeroconf #bug pulseaudio sudo ln -s /usr/lib/pulse-16.1+dfsg1/ /usr/lib/pulse-16.1 pactl load-module module-raop-discover
Discover Airplay in Ubuntu 22.10 with PipeWire
sudo vi /etc/pipewire/pipewire.conf
Add the following line to load module inside the context.modules = [ section
{ name = libpipewire-module-raop-discover }
sudo apt install libdvdnav4 libdvdread4 gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly libdvd-pkg sudo dpkg-reconfigure libdvd-pkg sudo apt install ubuntu-restricted-extras
pihole -up
Move the Dock 'Show Applications' button at top
gsettings set org.gnome.shell.extensions.dash-to-dock show-apps-at-top true
Move the windows control button to the left
gsettings set org.gnome.desktop.wm.preferences button-layout 'close,minimize,maximize:'