List of Command with options
1. grep : Find lines that match a regular expression
Syntex:
grep -C<N> "string" <FILENAME> => Print N lines around match
grep -i "string" <FILENAME> => Print irrespect of case sensitive word search
grep -w "string" <FILENAME> => Print full word search
grep -c "string" <FILENAME> => Print counting the matches
grep -l "string" <FILENAME> => Print only the filenames which matches the pattern
grep -e PatternOne -e PatternTwo -e PatternThree file =>Searching multiple patterns at once
2. find : It will display the pathnames of all files in the current director and all subdirectories.
find => [find . or find -print or find . -print]
find / -name abc =>It will search abc file in the entire system.
find /home/abc -name '*.txt' => Find all .txt files in directories abc.
find /home/abc -iname abc.txt => Find files using name and ignoring case.
find . -type f -perm 0777 -print => Find files based on their permissions.
find . -type f ! -perm 0777 -print => Find files based on their permissions.
find / -perm /u=s => Find all SUID set files
find / -perm /a=x => Find all executable files
find / -perm /u=r => Find all readonly files
find . -type f -name "file1.txt" -exec rm -f {} \; => Find and remove file1.txt
find . -type f -name "file1.txt" -print0 |xargs -0 rm -f => find and remove file1.txt
find . -type f -empty -exec rm -f {} \; => Find all empty files and remove.
find / -mtime 10 => Find all the files that were modified 10 days modified back.
find / -atime 10 => Find all the file that were accessed 10 days back.
find / -mtime +10 -mtime -20 => Find all the files which are modified more than 10 days back and less that 20 days
find / -mmin 1 => Find all the files modified in last 1 minute
find / -type -f -cmin 1 => Find all the files changed in last 1 minutes.
find / -size -1M => Find all the files which size is less than 1 MB.
find / -size +1M -size -3M => Find all the files which size is more than 1MB and less than 3MB.
find . \(-name a.out -o -name '*.o' -o -name 'core'\) -exec rm {} \; => Clean out temporary files.
find / -size +1G -mtime +300 -exec rm -rf {}; => Find files which are more thatn 1GB and not accessed for the past 10 months and delete them.
1. grep : Find lines that match a regular expression
Syntex:
grep -A<N> "string" <FILENAME> => Print N lines after match
grep -B<N> "string" <FILENAME> => Print N lines before matchgrep -C<N> "string" <FILENAME> => Print N lines around match
grep -i "string" <FILENAME> => Print irrespect of case sensitive word search
grep -w "string" <FILENAME> => Print full word search
grep -c "string" <FILENAME> => Print counting the matches
grep -l "string" <FILENAME> => Print only the filenames which matches the pattern
grep -e PatternOne -e PatternTwo -e PatternThree file =>Searching multiple patterns at once
2. find : It will display the pathnames of all files in the current director and all subdirectories.
find => [find . or find -print or find . -print]
find / -name abc =>It will search abc file in the entire system.
find /home/abc -name '*.txt' => Find all .txt files in directories abc.
find /home/abc -iname abc.txt => Find files using name and ignoring case.
find . -type f -perm 0777 -print => Find files based on their permissions.
find . -type f ! -perm 0777 -print => Find files based on their permissions.
find / -perm /u=s => Find all SUID set files
find / -perm /a=x => Find all executable files
find / -perm /u=r => Find all readonly files
find . -type f -name "file1.txt" -exec rm -f {} \; => Find and remove file1.txt
find . -type f -name "file1.txt" -print0 |xargs -0 rm -f => find and remove file1.txt
find . -type f -empty -exec rm -f {} \; => Find all empty files and remove.
find / -mtime 10 => Find all the files that were modified 10 days modified back.
find / -atime 10 => Find all the file that were accessed 10 days back.
find / -mtime +10 -mtime -20 => Find all the files which are modified more than 10 days back and less that 20 days
find / -mmin 1 => Find all the files modified in last 1 minute
find / -type -f -cmin 1 => Find all the files changed in last 1 minutes.
find / -size -1M => Find all the files which size is less than 1 MB.
find / -size +1M -size -3M => Find all the files which size is more than 1MB and less than 3MB.
find . \(-name a.out -o -name '*.o' -o -name 'core'\) -exec rm {} \; => Clean out temporary files.
find / -size +1G -mtime +300 -exec rm -rf {}; => Find files which are more thatn 1GB and not accessed for the past 10 months and delete them.
