Several command sections

Several command sections-Linux general technology-Linux technology and application information. For details, refer to the following section. Ll-S sort by size
Ll-rS sort by size in reverse order
Ll-h size human Mode
Ls-hs file added before, not sorted
Ls-t sort by Time
Ls-rt sort by time in reverse order
Ll-R recursive display subdirectory
Ll-HDR
Ls-l is displayed alphabetically by default.
Ls-rl reverse display

Ntbb.exe-r desc_nandx16_obm_blob_notrust_tavor_p0plus.txt
Make-f NTBB_linux.mak: Execute make compilation based on the specified file
Remove unnecessary carriage returns from dos2unix filename
Df-h
Df-H display disk usage ratio
Free-l view memory usage
Lsof-p id: view the files opened by the id process.
Lsof-I: 80

Find.-type d: print only Directories
Find.-type f: print files only
Find/home-cmin-files created within 10 minutes
Find/home-mtime-2 check files modified in the last two days under/home
Find/home-atime-1. Check the files that have been accessed within one day.
Find/home-mmin + 60 check files modified 60 minutes ago under/home
Find/home-amin + 30 check files that have been accessed in the last 30 minutes
Find/etc-name "passwd *"-exec grep gliet {}\;
Find.-ctime + 3-exec rm-rf {}\; delete everything a few days ago (including the directory name and files in the directory)