How to show line number in vi editor
: Run
:set nu
How to show line number in gedit
: 1)Click on Edit menu
2)Select the Preference
3)Tick the Display line numbers
How to clear the screen
: ctrl + l
How to check the IP
: ifconfig
How to check the running process
: ps aux | grep redis
How to add users
- Open the terminal application.
- Login to Ubuntu server using ssh.
- Add a new user named foo to www-data group by running
useradd -g www-data foo
command.
4) Add an existing user bar to Apache’s www-data group on Ubuntu using
usermod -a -G www-data bar
command.
5) Check the groups using following command
groups bar
OR
id foo
How to check disk storage
df -h
How to check folder storage
du -sh codepool
check the free memory
free -m
free -g
**Copy the files from one folder to another **
cp -a /source/. /dest/
The dot is used to copy all the files and folders from source folder
**GZ compress and extracting
**
tar -zcvf tar-archive-name.tar.gz source-folder-name
tar -zxvf backup.tar.gz
Extracting tar.xz
tar xf rrrrmages.tar.xz
Find the distribution version
lsb_release -a
Adding to path
1.add this in ~./bashrc file
if [ -d "new-path" ]; then
PATH=$PATH:new-path
fi
source ~/.bashrc
Compress file with exclude command
tar -zcvf wine_source_code.tar.gz html/ --exclude=html/var/session/* --exclude=html/var/cache/* --exclude=html/media/*
Find diff for two folders
diff -qr html/ /home/acer/works/projects/
Adding additional port to listen web request in firewall
ufw allow 81/tcp
How to fix the sound issue in Ubuntu 18.04 after the kernel upgrade
Edit the alsa-base.conf by adding following two entries
sudo gedit /etc/modprobe.d/alsa-base.conf
options snd-hda-intel dmic_detect=0
options snd-hda-intel model=alc256-asus-mic
Checking the current folder has any symlinks
find . -type l -printf '%p -> %l\n'
copy file from remote to local
scp -i <pem.pem> <username>@<ip>:/home/ubuntu/backup/file_backups/appf.tar.gz .
copy the files from one location to another with same root folder that alreay exist in target parth
cp -r app /var/www/html
ln -s /etc/nginx/sites-available/mydomain.com /etc/nginx/sites-enabled/mydomain.com
Delete Symbolic Link
sudo rm /etc/nginx/sites-enabled/mydomain.com
Remove Symbolic Link
sudo unlink /etc/nginx/sites-enabled/mydomain.com
Extracting sql.gz file
gzip -d dump-main-1664183353.sql.gz
Install Java download
First download the debian package
sudo dpkg -i /path/package_name.deb
If error
sudo apt-get install -f
