snippets.sh

# MYSQL import, this let you know where it goes the import by
# looking what is the last table that print
mysql -uroot mydatabase_development -A
show tables;
# UNIX command and tricks
# Search string in directory
# ref: http://stackoverflow.com/a/16957078
grep -rnw --exclude-dir=node_modules . -e "string-pattern"

# Find who is using some port, in this example, the port is `3000`
lsof -i :3000
# or
# ref: https://stackoverflow.com/a/19728840
sudo lsof -i:<port-number>
# or
# ref: http://stackoverflow.com/a/3855359
netstat -anp tcp | grep 3000
# or
lsof -i :4000 | grep LISTEN
# or, if u want the <PID> to do a `kill -9 <PID>`
lsof -i tcp:3000

# OR find a service
ps -def | grep passenger

# RESTART vagrant network
sudo ifconfig vboxnet0 down
sudo ifconfig vboxnet0 up

# -r: recursive
# . : search the current directory
# --exclude Exclude files

# Split a huge file in small chunks, in this case, 1Gb chunks with the a name that start with PREFIX_ ( -d use numeric suffixes instead of alphabetic, doesn't work on MAC )
split -b 1024m name_of_the_file PREFIX_
# To join the files, list the chunks with cat and tell where you want output the file
cat small_file_01 small_file_02 small_file_03 > NEW_FILE

# or, get all by the prefix
cat PREFIX_* > NEW_FILE

# Change file names in bulk.
# In this example, we change all file names ([a-z]) with extension txt 
# to the same name, but with _
# ahji.txt > ahji_.txt
mmv "*[a-z].txt" "#1_.txt"