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Get root rights for all session
sudo bash
Kill a process by its name
sudo killall PROCESS
Restart network configuration
sudo service network-manager restart
Check general logs
dmesg | tail -n 50
Display online one ls column
ls -lS | awk {'print$9'}
Manage archives
Create a tar.gz archive
tar -czf new-tar-file-name.tar.gz file1 file2 folder1 folder2
Extract a tar.gz archive
tar -xzf tar-file-name.tar.gz
Symbolic link
ln -s destinationFolder sourceFolder
ln -s /data/Téléchargements /home/guenmat/Téléchargements
SSD manual optimisation
sudo fstrim -v /
sudo fstrim -v /data
Fix aptitude
sudo fuser -cuk /var/lib/dpkg/lock
sudo rm -f /var/lib/dpkg/lock
Remove old kernels
sudo apt autoremove --purge
Remove a package and its configuration
sudo apt-get remove --purge XXX
Install all drivers
sudo ubuntu-drivers autoinstall
List all installed ppa
cat | grep ppa /etc/apt/sources.list.d/*.list
Search
List all files containing some text
find . -name "filenames" -exec grep -i -H -n 'texttofind' {} \;
find . -name "pom.xml" -exec grep -l "<doUpdate>" {} \;
find data -name "*.db" -print
Find text in file
grep -Ril "text" .
List file having a specific size
sudo find / -name '*' -size +1G
sudo find / -name '*' -size +500M
Remove all ".svn" folders from a folder
find . -name ".svn" -exec rm -rf {} \;
Remove all "Thumbs.db" files
find . -name "Thumbs.db" -exec rm -rf {} \;
Calibre:
find . -name "*.opf" -exec rm -rf {} \;
find . -name "*.jpg" -exec rm -rf {} \;
Clean music:
find . -name "*.wma" -exec rm -rf {} \;
find . -name "*.mp3" -exec rm -rf {} \;
List all extensions from a folder
find . -type f -name "*.*" | awk -F. '{print $NF}' | sort -u
Detect netorks errors:
find . -name "cifs*"
find . -name "cifs*" -exec rm -rf {} \;
Read mp3 tags recursively and ouput in CSV files:
find . -name "*.mp3" | while read i; do
mp3info -p "%F;%a;%l;%n;%t;%g;%y\n" "$i"
done > /tmp/mp3tags.csv
Open SSH
When it is impossible to connect to a distant server after a fresh install, and when the error message is:
Connection reset by IP port XX
Then it is needed to type the following commands on the distant server:
sudo rm /etc/ssh/ssh_host_* && sudo dpkg-reconfigure openssh-server
sudo service sshd restart
Data transfer
Huge files
nohup scp -r user@XX.XX.XX.XX:/path/folder . > nohup.out 2>&1
Through SSH
scp -r /data/Musique/* guenmat@192.168.0.144:/data/Musique/
scp -r /home/guenmat/Vidéos/tmp/* guenmat@192.168.0.144:/data/Vidéos/tmp/
Check used memory
sudo aptitude install htop
sudo htop
Or
ps aux --sort -rss
Check empty disk space
df -h
ncdu
Get the bigger files
sudo du -ch / | sort -n
Find a process accorfing to a port number
netstat -tlnp | grep num_port
netstat -lapute
Display listening ports
sudo lsof -i -P -n | grep LISTEN
sudo nmap -sT -O localhost
ou
sudo service ufw stop
lsof -i :1025-9999 +c 15
Snap package manager
To install a package
sudo snap install --classic PACKAGE
To list all pending actions
snap changes
To cancel an action (using the ID from the previous command)
sudo snap abort ID
To find a package
sudo snap find PACKAGE
To list the isntalled package
sudo snap list
To update a package
sudo snap refresh PACKAGE
To delete a package
sudo snap remove PACKAGE
Remove Nvidia packages
sudo apt-get remove --purge '^nvidia-.*'
Kworker going crazy!
sudo bash
echo "disable" > /sys/firmware/acpi/interrupts/gpe6F