My Most Used Linux Commands

Here are a few LINUX commands that i very often refer to:

• Find files modified in last 7 days:  
  
  find . -type f -mtime -7
• Count number of files in a directory:
  
  ls -f | wc -l
• Create a soft link:  (ln -s [TARGET DIRECTORY OR FILE] ./[SHORTCUT])
  
  ln -s /mnt/san/mywebsite /var/www/mywebsite
• Organize folders by size:
  
  du -h --max-depth=1 /home | sort -n -r | grep M | more
  

  grep M to show only MBs.

• Check MISS ot HIT state in Squid access.log file:
  
  cat /var/log/squid/access.log.* | grep HIT | wc -l
• Stream Editor to find and replace a string:
  
  find . -type f -exec sed -i 's/oldstring/newstring/g' {} \;
  
• To print a selected column from a text file on screen:
  
  awk '{print $1}' file.txtawk '{print $1}' file.txt > output.txt

• Sort a text file basing on a particular column:
  
  sort -t, -n -K4 FileToBeSorted.txt > SortedFile.txt
  
• Change default editor in RHEL to nano:
  
  export EDITOR=/usr/bin/nano
  
• To be continued .....