Unix Shell Scripting

Delete 10 newest files in Linux The code you'd want to include in your script is rm -f $(ls -1t /path/to/your/logs/ | tail -n +11) The -1 (numeric one) option prints each file on a single line, to be safe. The -f option to  rm  tells it to ignore non-existent files for when  ls  returns nothing. Or use the below command ls -d -1tr /path/to/folder/* | head -n -10 | xargs -d '\n' rm -f Delete latest 3 files: rm -f $(ls -1t ./ | head -3)    Find a folder Just find directories and skip file names pass the  -type d  option as follows: find   / - type d -name "apt" - ls locate httpdocs Gives the time stamp date +%Y%m%d -s "20081128" date +%T -s "11:18:00" Stat file.txt newest=$(find subdir -newer timestamp -printf "%A%p\n" |                 sort -n |          ...

Sed Command to Delete Lines : Sed command can be used to delete or remove specific lines which matches a given pattern or in a particular position in a file. Here we will see how to delete lines using sed command with various examples. The following file contains a sample data which is used as input file in all the examples: > cat file linux unix fedora debian ubuntu SED COMMAND TO DELETE LINES - BASED ON POSITION IN FILE In the following examples, the sed command removes the lines in file that are in a particular position in a file. 1.  Delete first line or header line The d option in sed command is used to delete a line. The syntax for deleting a line is: > sed 'Nd' file Here N indicates Nth line in a file. In the following example, the sed command removes the first line in a file. > sed '1d' file unix fedora debian ubuntu 2.  Delete last line or footer line or trailer line The following sed comm...