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Calculate a list of duplicate md5 sum hashes for all the ".java" files in the /testbed directory
md5sum /testbed/*.java | awk '{print $1}' | sort | uniq -d
Calculate md5 sum of the md5 sum of all the sorted files under /testbed/dir2/subdir2
find /testbed/dir2/subdir2 -type f -print0 | sort -z | xargs -r0 md5sum | md5sum
Calculate the md5 sum of the contents of the sorted list of files "$FILES"
cat $(echo $FILES | sort) | md5sum
Calculate the md5 sum of the md5 sum of all the files sorted under /testbed/dir2/subdir2
find testbed/dir2/subdir2 -type f -print0 | sort -z | xargs -r0 md5sum | md5sum
Calculate the md5 sum of the sorted list of md5 sums of all ".py" files under /testbed/dir1/subdir1
find /testbed/dir1/subdir1 -type f -name *.py -exec md5sum {} + | awk '{print $1}' | sort | md5sum
Calculate the md5sum of each ".py" file under /testbed/dir1/subdir1, sort the output, and calculate the md5sum of that
find /testbed/dir1/subdir1 -type f -name "*.py" -exec md5sum {} + | awk '{print $1}' | sort | md5sum
Calculate the total disk usage for each ".txt" file on the /testbed directory and prepend the system host name to the output
find /testbed / -iname '*.txt' -exec du -s {} + | sed 's/^/$(hostname): /'
Change directory to the directory containing the executable file of command "python"
cd $(which python | xargs dirname)
Change permissions for all PHP files under the /testbed directory tree to 755 and print the number of files changed
find /testbed -name "*.php" -exec chmod 755 {} \; -exec /bin/echo {} \; | wc -l
Check if current shell is running within a 'screen' process.
pstree --show-parents -p $$ | head -n 1 | sed 's/\(.*\)+.*/\1/' | wc -l
Check if the contents of file /testbed/dir3/subdir1/subsubdir1/textfile3.txt is a subset of file /testbed/dir2/subdir1/textfile2.txt
comm -23 <(sort /testbed/dir3/subdir1/subsubdir1/textfile3.txt | uniq) <(sort /testbed/dir2/subdir1/textfile2.txt | uniq) | head -1
Compress in parallel regular files in the testbed directory tree that were last modified more than 7 days ago
find /testbed -type f -mtime +7 | tee compressedP.list | xargs -I{} -P10 compress {} &
Compress regular files in the testbed directory tree that were last modified more than 7 days ago
find /testbed -type f -mtime +7 | tee compressedP.list | xargs -0 gzip
Compute the mean average of the word count of *.txt files in the /testbed directory
find /testbed -name '*.txt' -print0 | xargs -0 wc -w | awk 'END { print $1/(NR-1) }'
Compute the mean average of the word count of *.txt files smaller than 2000 words in the /testbed directory
find /testbed -name '*.txt' -print0 | xargs -0 wc -w | awk '$1 < 2000 {v += $1; c++} END {print v/c}'
Copies all files with "FooBar" in the path under the '/testbed/dir1' directory to the '/testbed/dir3/subdir1/subsubdir1/tmp' directory.
find /testbed -name '*FooBar*' -print0 | xargs -0 -I{} cp -R {} /testbed/dir3/subdir1/subsubdir1/tmp
Construction with additional '-exec true' to be used if both commands need to run regardless of their success or failure.
find /testbed -name "*.txt" \( -exec echo {} \; -o -exec true \; \) -exec grep banana {} \;
Convert the first 16 characters in "/testbed/textfile7.txt" to a single hexadecimal value
head /testbed/textfile7.txt -c16 | od -tx1 -w16 | head -n1 | cut -d' ' -f2- | tr -d ' '
Copies all files under the /testbed folder like "file.txt" with "FooBar" in the path to the root of the current folder, preserving mode, ownership and timestamp attributes.
find /testbed -name "file.txt"| grep "FooBar" | xargs -i cp -p "{}" .
Copy all files below the /testbed directory whose names contain "FooBar" to directory '/testbed/dir3/subdir1/subsubdir1/tmp'
find /testbed -name '*FooBar*' -print0 | xargs -0 -I{} cp -R {} /testbed/dir3/subdir1/subsubdir1/tmp
Count all the lines of all '*.c' files in /testbed directory recursively
find /testbed -name "*.c" -print0 | xargs -0 cat | wc -l
Count all the lines of all files with names ending with 'php' in current directory recursively
find -name '*php' | xargs cat | wc -l
Count all the lines of all php files in the /testbed directory recursively
find /testbed/ -name '*.php' | xargs cat | wc -l
Count all the lines of code in all php files in the /testbed directory recursively
find /testbed -name "*.php" -type f -exec grep -v -c '^$' {} + | awk '{ cnt += $0 } END { print cnt }'
Count md5sum of all '*.py' files in /testbed folder with subfolders.
find /testbed -type f -name "*.py" -exec md5sum {} + | awk '{print $1}' | sort | md5sum
Count the *.html files residing in the /testbed directory tree and containing string "foo"
find /testbed -name "*.html" | xargs grep -l foo | wc -l
Count the number of files named 'job.history' under '/testbed' directory tree that match 'FAIL' in their contents
find /testbed -name job.history | xargs grep -l FAIL | wc -l
Count the number of files/directories with '.php' extension under /testbed directory tree and change the permissions to 755
find /testbed -name "*.php" -exec chmod 755 {} \; -exec /bin/echo {} \; | wc -l
Count the number of lines in all ".php" files in the /testbed directory tree
find /testbed -name '*.php' -type f | xargs cat | wc -l
Count the number of lines in all files in the /testbed directory tree that match pattern 'foo??'
find /testbed/ -name 'foo??' | sort | xargs wc -l
Count the number of regular files in directory tree ${DIRECTORY} that contain a vowel in their names
find ${DIRECTORY} -type f -print | sed -e 's@^.*/@@' | grep '[aeiouyAEIOUY]' | wc -l
Count the number of unique file extensions in the /testbed directory tree
find /testbed -type f | sed -e 's/.*\.//' | sed -e 's/.*\///' | sort | uniq -c | sort -rn
Count the total number of lines in all "*.gz" files in the /testbed directory tree after decompression
find /testbed -type f -name '*.gz' | xargs zcat | wc -l
Counts all files in the /testbed folder and subfolders.
find /testbed -type f -exec ls -l {} \; | wc -l
Count lines in each *.php file sorted by file in /testbed directory.
find /testbed -name '*.php' -type f | sort | xargs wc -l
Counts lines in each *.php file in /testbed directory, sorted by number of lines, descending.
find /testbed -name '*.php' -type f | xargs wc -l | sort -nr
Counts lines in each of *.php files in the /testbed folder and subfolders and prints total count.
find /testbed -name '*.php' | awk '{print $0}' |xargs wc -l
Counts lines in each of *.php files in the /testbed folder with subfolders and prints total count as well.
find /testbed -name '*.php' | xargs wc -l | sort -r
Counts number of occurences of all ip addresses in '/etc/networks' file, and prints all addresses with number of occurences in a descending order.
cat /etc/networks | sort | uniq -c | sort -nr | awk '{print $2 $1}'
Counts sum of non-empty lines from all .php files in /testbed folder.
find /testbed -name "*.php" -type f -exec grep -v -c '^$' {} + | awk '{ cnt += $0 } END { print cnt }'
Counts total lines in all *.php files in the /testbed directory recursively
find /testbed -name '*.php' -type f | xargs cat | wc -l
Counts total number of only lines with alphanumeric symbols in all *.php files in the /testbed folder and subfolders.
find /testbed -name '*.php' | xargs cat | awk '/[a-zA-Z0-9]/ {i++} END{print i}'
Counts total lines in PHP and JS files in /testbed.
find /testbed -name '*.js' -or -name '*.php' | xargs wc -l | grep 'total' | awk '{print $1}'
Create a table containing all information from /testbed/dir1/subdir1/textfile4.txt and /testbed/dir2/subdir2/textfile5.txt, merging lines where the first field of both files matches, and keeping the line that starts with "Gene" at the start of the file.
join -a1 -a2 <(sed s/^Gene/00ne/ /testbed/dir1/subdir1/textfile4.txt | sort) <(sed s/^Gene/00ne/ /testbed/dir2/subdir2/textfile5.txt | sort) | column -t | sed s/^00ne/Gene/
Create an empty file "abc.txt" in each directory named "dir1" under testbed directory.
find /testbed -type d -name "dir1" -print | sed 's/$/\/abc.txt/g' | xargs touch
Create archive "/backup1.tar" of all subdirectories of the /testbed directory without the prefix "testbed"
find /testbed -mindepth 1 -maxdepth 1 -type d | xargs tar czf /backup1.tar --transform 's,^testbed/,,'
Create logs.tar.gz of all older than one day logs of Ubuntu
find /var/log/ -mtime +1 | xargs tar -czvPf /testbed/logs.tar.gz
Delete and count files in "/testbed/dir3/subdir1/subsubdir1/tmp" that are older than 2 days
find /testbed/dir3/subdir1/subsubdir1/tmp -type f -mtime +2 -print0 | xargs -0 rm -f
Display the 5 largest files in the /testbed directory and its sub-directories.
find /testbed -type f -exec ls -s {} \; | sort -n -r | head -5
Display the 5 smallest files in the /testbed directory and its sub-directories ignoring any empty files.
find /testbed -not -empty -type f -exec ls -s {} \; | sort -n | head -5
Display the 5 smallest files in the /testbed directory and its sub-directories.
find /testbed -type f -exec ls -s {} \; | sort -n | head -5
Display the biggest file sizes only in the /testbed directory
find /testbed -type f -exec du -Sh {} + | sort -rh | head -n 5
Find .java files in the testbed directory tree that contain 'Hello', and print their names
find /testbed -name "*.java" -exec grep -Hin Hello {} + | cut -d ":" -f 1 | xargs -I{} basename {}
Print a list of all duplicate case insensitive filenames in the /testbed directory tree
find /testbed -type f | awk -F/ '{print $NF}' | sort -f | uniq -i -d
Print all unique file paths under "testbed/dir1" compared to "testbed/dir2"
comm -23 <(find /testbed/dir1 | sed 's#/testbed/dir1/##' | sort) <(find /testbed/dir2 | sed 's#/testbed/dir2/##' | sort) | sed 's#^#/testbed/dir1/#'
Recursively finds all files containing text 'Hello' and prints folder where they are placed.
grep -r Hello * | awk '{split($1, path, ":"); print path[1]}' | xargs -I{} dirname {}
Prints total number of lines of all *.java files in /testbed folder and subfolders.
find /testbed -name '*.java' -print0 |xargs -0 wc -l|grep 'total' |awk '{ print $1 }'
Create a symbolc link in the /testbed/dir3/subdir1/subsubdir1/FooBar to root folder
ln /testbed/dir3/subdir1/subsubdir1/FooBar -s /
search for all the files in the folder /testbed/dir1 which have sticky bit set and have the permissions 553
find /testbed/dir1 -perm 553
search for php files in /testbed directory and search for "world" in all these files
find /testbed -name '*.php' -exec grep -iq "world" {} \; -print
Recursively finds all files with any cased text "Hello" in the '/system/folder1' folder, and precedes found string with its number in file.
grep -inr "Hello" /system/folder1
Recursively finds all files with whole word "foo" in the '/system', and precedes found string with its number in file.
grep -rnw /system -e "foo"
Recursively list contents of the '/system' directory in a tree-like format
tree /system
Recursively print all files and directories in the '/system/folder2' directory tree including hidden files
tree -a /system/folder2
Recursively prints all folders in the '/system' folder that contain files like "*.out".
find /system -name "*.out" -print0 | xargs -0 -n1 /system | sort --unique
Recursively remove all "*.txt" files in the '/system' folder and answer "y" to any prompt
yes y | rm -r /system/*.txt
Recursively removes all empty folders from the /system/folder3/temp folder.
find /system/folder3/temp -depth -type d -exec rmdir {} \;
Recursively removes all empty folders under /system/folder3/temp, printing info message on each operation, and suppressing error messages if folder is not empty.
find /system/folder3/temp -type d -empty -exec rmdir -vp --ignore-fail-on-non-empty {} +
Recursively removes all files in the /system/folder1 folder but '*txt' files.
find /system/folder1 -type f -not -name '*txt' | xargs rm
Recursively rename all files under /system/folder1 replacing 'special' with 'regular' - all file/diretory names may not include spaces, and directory names containing such files may not contain the word 'special' in their name.
find /system/folder1 -type f -exec rename 's/special/regular/' '{}' \;
Recursively search for "foo" in the '/system' folder and write the output to the console followed by the number of matched lines
grep -r "foo" /system | tee >(wc -l)
Recursively search for all regular files below directory "/system/folder3/", and output the name of each, without any containing directories.
find /system/folder3/ -type f -exec basename {} \;
Recursively unzip files to stdout in "/system/folder2.tar.gz" and search for "special"
zcat -r /system/folder2.tar.gz | grep "special"
Remove "\r" at the end of each line in "system/folder3/temp/temp1/text1.txt" and display the result as printable characters or backslash escapes
cat /system/folder3/temp/temp1/text1.txt | sed 's/\r$//' | od -c
Remove all *.doc files from the /system/folder1 tree
find /system/folder1 -name '*.doc' -exec rm "{}" \;
Remove all *.log files from the /system/folder1 tree
find /system/folder1 -name '*.log' -print0 | xargs -0 rm
Remove all *.txt files in '/system' directory but not in it's subdirectories
find /system -maxdepth 1 -name '*.txt' -maxdepth 1 | xargs rm
Remove all *.sql files in the '/system/folder3/backup_dbg' directory that were last modified more than 25 days ago
find /system/folder3/backup_dbg/*.sql -mtime +25 -exec rm -f {} \;
Remove all *.txt files under the /system/folder1 directory modified more than 5 minutes ago
find /system/folder1 -maxdepth 1 -mmin +5 -type f -name "*.txt" -delete
Remove all *.txt files, except "keep.txt", under /system/folder1 directory modified more than 5 minutes ago
find /system/folder1 -maxdepth 1 -mmin +5 -type f -name "*.txt" ! -name "keep.txt" -delete
Remove all .sh files in the '/system/folder1' tree whose names begin with "new"
find /system/folder1 -name 'new*.sh' -exec rm -f '{}' \;
Remove all a.out, *.o, and core files under the '/system' directory
find /system \( -name a.out -o -name '*.o' -o -name 'core' \) -exec rm {} \;
Remove all but 5 last comma-separated fields from each line in '/system/folder1/data.csv'
cat /system/folder1/data.csv | rev | cut -d, -f-5 | rev
Remove all directories called "temp" from the /system directory tree
find /system -name "temp" -type f -delete
Remove all empty files in /system/folder3/temp and below
find /system/folder3/temp -type f -empty -print | xargs rm -f
Remove all files 'a.out' and *.o in the /system directory tree that were modified more than 7 days ago
find /system \( -name a.out -o -name '*.o' \) -mtime +7 -exec rm {} \;
Remove all files and directories under '/system/folder3/temp' directory tree that match with one of the name patterns '.DS_Store', '._.DS_Store' , '._*', '.TemporaryItems' or '.apdisk'
find /system/folder3/temp \( -name '.DS_Store' -or -name '._.DS_Store' -or -name '._*' -or -name '.TemporaryItems' -or -name '.apdisk' \) -exec rm -rf {} \;
Remove empty directories from directory tree /system
find /system -type d -empty -exec rm -r {} \;
Remove everything within parentheses and substitute all non digit characters with a space from "1/2 [3] (27/03/2012 19:32:54) word word word word 4/5" and format the output as a table
echo '1/2 [3] (27/03/2012 19:32:54) word word word word 4/5' | sed -e 's/(.*)//' -e 's/[^0-9]/ /g' | column -t
Remove files text2, text3, text4 in directory /system/folder1
find /system/folder1 -name 'text[2-4]' -exec rm {} \;
Remove files from the /system directory that are owned by nobody
find /system -nouser -exec rm {} +
Remove files that are greater than 1KB in size under /system directory
find /system -type f -size +1k -exec rm {} +
Remove junk files modified more than 31 days ago recursively from "/system"
find /system -type f -mtime +31 -exec rm -f {} \;
Remove newline characters from "/system/folder3/temp/temp1/text1.txt"
paste -sd "" /system/folder3/temp/temp1/text1.txt
Remove regular files in the /system directory tree
find /system -type f -print0 | xargs -0 -n1 echo rm | sh -x
Print summary of new/missing files, and which files differ between /system/folder1 and /system/folder2, sorted alphabetically.
diff -qr /system/folder1 /system/folder1 | sort
Print amount of space available on the file system containing path to the /system directory in megabytes.
df /system -B MB | tail -1 | awk {'print $4'} | grep .[0-9]*
Recursively find the latest modified file in the /system directory
find /system -type f | xargs ls -ltr | tail -n 1
Display the number of sub-directories for all directories under /system directory tree, sort them according to the decreasing order of the number and show only the first 10 of them
find /system -type d -ls | awk '{print $4 - 2, $NF}' | sort -rn | head
archive all files in /system/folder1 directory modified in the last 60 days to "/mytarfile.tgz"
tar czvf mytarfile.tgz `find /system/folder1 -mtime -60`