Detailed Articles
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General Search
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Useful One Off Recipes
Disk Management
List directories from largest to smallest at the top level only. On older system h will not work and you must use k.
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finddu / -namesh [filename] -print # find a file
find / -size +51024 -print # where 51024 is in Kilobytes which is approximately 5MB |
Search Inside of Files
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Long Running Processes
Look for long running processes,
Information
Last
Last searches back through the file /var/log/wtmp (or the file designated by the -f flag) and displays a list of all users logged in (and out) since that file was created.
Lastb
Lastb is the same as last, except that by default it shows a log of the file /var/log/btmp, which contains all the bad login attempts.
Quck String Manipulation
Quick reference of manipulating standout,
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find [folder] -type f | xargs -I {} grep -li "text" {}
find [folder] -type f # search the specified folder for all files, returns full path of each file
| xargs -I {} grep -li "[text]" {} # piped into xargs to grep for all files containing specified text ignoring case |
Search & Replace Inside of Files
echo "some_file_name.txt" | tr "_" " " # result will be "some file name.txt"
paste oldName.txt newName.txt > runMe.txt # connects line by line to contents of both files together |
Integrity Checking
MD5
Check if a file is corrupt,
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find# [folder] -type f | xargs -I {} grep -li "text" {} | xargs perl -pi -e 's/[text_to_search_for]/[text_to_search_for]/g'
find [folder] -type f # search the specified folder for all files, returns full path of each file
| xargs -I {} grep -li "[text]" {} # piped into xargs with to grep for all files containing specified text ignoring case
| xargs perl -pi -e 's/[text_to_search_for]/[text_to_replace_with]/g' # pipe list of files and using perl search and replace with specified text |
Disk Management
List directories from largest to smallest at the top level only. On older system h will not work and you must use k.
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du -sh * | sort |
Long Running Processes
Other Useful Commands
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On Ubuntu
md5sum /path/to/file
# On Solaris
digest -a md5 -v /path/to/file |