Common Linux Commands

Understand a Command

1. $ man command for manual pages
2. $ command --help for help

Run at Background

The screen command launches a terminal in the background which can be detached from and then reconnected to. You can start a screen, kick off a command, detach from the screen, and log out. You can then log in later and reattach to the screen and see the program running.

• startup
  $ screen -S XXX.py

• detach
  Ctrl + a + d

• reattach
  $ screen -r

from https://access.redhat.com/articles/5247

Monitor Resources

• Network Bandwidth
  $ nload

  Other 17 commands：https://www.binarytides.com/linux-commands-monitor-network/

• CPU
  $ top

• GPU
  $ nvidia-smi

• Disk
  1. $ du -h
  2. $ df -h
• Continuous Monitoring
  $ watch -n 0.5 nvidia-smi

Rename files in batches

$ rename [options] "s/oldname/newname/" file

Command rename’s options and parameters:

-n preview result without execute
(directly execute if without option [-n])
s stands for ‘substitution’
[()] Represents matching the content in []
// The empty space between the two slashes means replacing the empty content, equivalent to deleting
g means all matches, only one bracket will be matched by default if without it
^- add characters at the beginning of the file name

Other rules：https://www.cnblogs.com/mianbaoshu/p/11772876.html
Perl regular expressions：https://perldoc.perl.org/perlre