ifconfig: View card information
pidof: view the process ID
kill: a closed process ID
killall: XX shut down all service-related processes
uname: View system kernel information, plus -a display all the information
who: View user login
last: System Log Record
history: view the run command history, "Digital!" you can run the command, add -c to clear all records
sysreport: packaging system information, to prepare to provide maintenance personnel
Display Contents: ls -L | grep "^ d" or ls -F | grep "/ $"
Show Files: ls -L | grep "^ -"
cat: show the file contents
more: page display file contents
5 line content before the show: head -n 5 filename
5-line display contents: tail -n 5 filename
5 lines continue to refresh the display contents: tail -n 5 -f filename
Character conversion: tr [are converted contents] [converted content]
Statistics line: wc -L filename
Count the number of words: wc -w file name
Statistics Number of characters: wc -c filename
View the file information: stat filename
Extraction Column 1 information: character intervals: cut -d1: -f 1 filename
Compares two files are the same: diff -brief file 1 file 2
2 show the various files: diff -c file1 file2