Linux Commands
ls - show files in current path
cd - change directory
cat - display file contents
vi / vim - Editor
pwd - show current path
man - Help
su - switch user
passwd - change password
useradd - create new user account
userdel - delete user account
mount - mount file system
umount - unmount file system
df - show disk space usage
cp - copy file or directory
mv - move file or directory
rm - remove file or directory
pwd - show current position
mkdir - create directory
rmdir - remove directory
less - display file contents pagewise
ps - show process status
head - show first lines
tail - show last lines
grep - show lines matching
chmod - change file mode, add or remove permission
chown - change owner of the file
:q - quit
:wq - save and quit
:q! - force quit without saving
shutdown - shutdown computer
Viewing permissions
#ls -l
Database login
#mysql -u username -ppassword dbname
Dropping database And create in same name
#drop database dbname;
#create database dbname;
Show Tables
#Show tables
Permission for myDoc.txt 644
#chmod 644 myDoc.txt
Base Url Changing
#update core_config_data set value = 'http://domainname.com/' where path like '%base_url%';
Force Remove files
#rm -rf
in folder permission for all
#chmod 0755 . -R
Changing group ownership
#chgrp new_group some_file
Changing file ownership
#chown you some_file
Bulk chmod
#find directory -type d -exec chmod 755 {} +
#find directory -type f -exec chmod 644 {} +
DB setup system
update base url in the database
go to mysql prompt
#use database_name;
#update core_config_data set value = 'http://baseurlofthesite.com/' where path like '%base_url%';
create a database backup from terminal
mysqldump -u username -ppassword dbname [tablename - optional] > filename.sql
restore a database backup from terminal
mysql -u username -ppassword dbname [tablename - optional] < filename.sql
you can add nohup in front of a linux command, to make it no-hangup, once nohup is mentioned, even if the ssh session is broken ( if the internet connection is cut off, or the pc crashes) the server command will continue to run. nohup will output all the output to a file called nohup.out.
if you add an ‘&’ to the end of a command, a background process will be allocated to the command, and you can work with the terminal.
so, for any of the above commands (other than sql commands ), it is recommended to use the command as
#nohup &