Day 1 Shell

truncate -s

touch blank.txt
truncate -s 16 blank.txt
hexdump -C blank.txt

head -c 41 longfile > testfile

tar -cf

tar -cf a.tar a

Unzip by Shell doesn't change permissions and file creation date.
tar -xvf a.tar

ls -ptm

sorted by file creation, and use comma to seperate

git log --format='%H' -n5

limit to 5 commits, Shows only the hash

git ls-files --others --ignored --exclude-standard

• git ls-files: lists the files that are in the repository.
• --others: Displays files that are not in the GIT index.
• --ignored: Displays the ignored files that were defined in .gitignore.
• --exclude-standard: lists the files deleted by default.

patch a sw.diff -o b

find . -type f ( -name '##' -o -name '~' ) -print -delete

magic file

file -m ft_magic.mgc -k -i testfile
The -k option shows all matches if there are multiple.

touch "\"\?\$filename\$?\\""