Linux Ask! is a Q & A web site specific for Linux related questions. Questions are collected, answered and audited by experienced Linux users.
Mount all filesystems mentioned in fstab immediately
Answer:
To mount all filesystems mentioned in /etc/fstab immediately, use the following command:
# mount -a
It is very useful especially when you have finished updated the /etc/fstab file and want to see the effect without reboot.
Find files by group
Answer:
If you are only interested in finding files that belong to a particular group, try the command:
# find /data -type f -group john
Find files by owner
Answer:
If you are only interested in finding files that belong to a particular user, try the command:
# find /data -type f -user john
Convert DOS/MAC to UNIX text file format converter
Answer:
Sometimes if a file was edited on Windows, and you might find strange characters "^M" occur at the end of every line when you open in vim under Linux, you can use the dos2unix command to reformat the file format to remove them.
E.g.
# dos2unix input.pl output.pl
Find the number of running processes on your system
Answer:
With a simple command, you can find the number of running processes on your system.
# ps ax | wc -l | tr -d " "
64
