echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
# that modifies the file watch limit to max 524,288 which consume approx. 512MB Ram for 64bit.
# reduce that number to consume less memory.

# to see if that did it run
cat /proc/sys/fs/inotify/max_user_watches

# you should see
fs.inotify.max_user_watches=524288

Ubuntu

sudo gedit /etc/sysctl.conf

Add a line at the bottom

fs.inotify.max_user_watches=524288

Then save and exit!

sudo sysctl -p

echo fs.inotify.max_user_watches=582222 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

# insert the new value into the system config
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p

# check that the new value was applied
cat /proc/sys/fs/inotify/max_user_watches

# config variable name (not runnable)
fs.inotify.max_user_watches=524288

$ sudo sysctl fs.inotify.max_user_watches=524288
$ sudo sysctl -p

sudo sysctl -w fs.inotify.max_user_watches=524288