Linux Commands for Beginners--Viewing Resources--du,df,free commands

逃离我推掉我的手 2022-11-22 12:52 113阅读 0赞

**In this part, I talk about viewing system resources.  
  
  
1.COMMAND :  
df   
DESCRIPTON :  
report file system disk space usage  
SYNOPSIS :  
df \[OPTION\]... \[FILE\]...  
OPTION :  
\-h, \--human-readable  
Example :  
\[piniheaven@localhost ~\]$ df -h  
Filesystem Size Used Avail Use% Mounted on  
/dev/sda1 15G 5.4G 9.0G 38% /  
tmpfs 2.8G 884K 2.8G 1% /dev/shm  
  
  
  
  
2.COMMAND :  
du  
DESCRIPTION :  
estimate file space  
SYNOPSIS :  
du \[OPTION\]... \[FILE\]...  
OPTION :  
\-s, --summarize  
display only a total for each argument  
 \-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)  
Example :  
\[piniheaven@localhost ~\]$ ls  
Desktop Documents Music Public SolftWare tutorial  
distribute-0.6.49 Downloads Pictures Python-2.7.3 Templates Videos  
\[piniheaven@localhost ~\]$ du \-sh Videos  
254MVideos  
  
  
  
  
3.COMMAND :  
 free  
DESCRIPTION :  
Display amount of free and used memory in the system  
SYNOPSIS :  
free \[-m\]  
OPTION :  
\-m switch displays it in megabytmegabytes.  
Example :  
\[piniheaven@localhost ~\]$ free\-m  
 total used free shared buffers cached  
Mem: 5690 1736 3953 0 74 615  
\-/+ buffers/cache: 1046 4644  
Swap: 0 0 0  
Explanation:  
Actual Used Physical Memory (Memory Used by Apps) :1046 MB  
Actual Free Physical Memory (Memory Available For Apps) :4644 MB**

**If you want to know more about what is the difference between buffer and cache memory,you can click following link.**

**[buffer&cache][buffer_cache]**

[buffer_cache]: http://www.blurtit.com/q542718.html