Search commands:

Find: search the file by name, type or attributes

• find ~/ -name “github.pem” # find by file name
• find . -type f # find all files in specific directory
• find . -type d # get all directory and sub directory specific location
• find . -mtime -7 # get modified files in last 7 days

grep – search inside a file

• grep “error” filename # find string
• grep -i “error” file name # case-insestive search
• grep -r “error” src/ search all files in dir and sub dir
• grep -n “error” logfile.txt # print line number where error find

locate – fast filename search

locate github.pem

link – one file point to another file point

ln

• softlink : if delete original file application will break

• hardlink : this will works still delete original file

• ln -s source desc

• ln source desc

compress the files using tar

• tar -czvf spring.tar spring-petclinic/

  • -c create file
  • -z zip file
  • -v vebsore
  • -f force

• tar -xzvf spring.tar

• Extract to a specific folder: tar -xf filename.tar.gz -C /path/to/directory