Informazioni di sistema con procinfo

Nei sistemi Linux e BSD, esiste la "directory" /proc che da molte informazioni riguardanti il sistema.

Provate a dare questo comando per vedere cosa c'è dentro:

$ ls -l /proc

Solo che non è molto facile da leggere, soprattutto per i neofiti.

Ma ho scoperto una piccola utility da riga di comando che si occupa di formattare le varie informazioni per renderle più leggibili: procinfo.

Provate a lanciarlo senza parametri:

$ procinfo
Memory:        Total        Used        Free     Buffers                       
RAM:        32785248     8066664    24718584      455556                       
Swap:              0           0           0                                   

Bootup: Mon Jul 11 09:24:16 2016   Load average: 0.09 0.11 0.09 1/470 18180    

user  :      04:11:54.19   7.3%  page in :         28756888                    
nice  :      00:00:01.60   0.0%  page out:         36124012                    
system:      06:30:31.25  11.4%  page act:          7866661                    
IOwait:      00:15:18.20   0.4%  page dea:                0                    
hw irq:      00:00:00.00   0.0%  page flt:        160436368                    
sw irq:      00:00:43.84   0.0%  swap in :                0                    
idle  :   1d 22:17:14.64  80.8%  swap out:                0                    
uptime:   3d 23:11:15.66         context :        580691538                    

irq   0:         16  2-edge timer        irq  25:          0  1-edge dmar1     
irq   1:         12  1-edge i8042        irq  27:    1477258  327680-edge xhci_
irq   5:          0  5-edge parport0     irq  28:    1665205  512000-edge ahci[
irq   8:          1  8-edge rtc0         irq  29:         13  360448-edge mei_m
irq   9:         28  9-fasteoi acpi      irq  30:    8799908  1572864-edge enp3
irq  12:         19  12-edge i8042       irq  31:         21  49152-edge snd_hd
irq  16:        131  16-fasteoi ehci_h   irq  32:         24  32768-edge i915  
irq  17:       5678  17-fasteoi snd_hd   irq  33:        205  442368-edge snd_h
irq  23:        151  23-fasteoi ehci_h   irq  34:    3050368  524288-edge nvidi
irq  24:          0  0-edge dmar0                                              

sda           900972r          641803w   sdc              938r              21w
sdb              233r             280w                                         

enp3s0      TX 3.63GiB       RX 6.64GiB       lo          TX 9.65MiB       RX 9.65MiB  

Ci sono poi diverse opzioni, che danno sempre le stesse info, ma con formattazioni diverse.

Ad esempio, per rendere tutto più leggibile:

$ procinfo -H
Memory:        Total        Used        Free     Buffers                       
RAM:        31.27GiB     7.71GiB    23.56GiB   444.88MiB                       
Swap:          0.00B       0.00B       0.00B                                   

Bootup: Mon Jul 11 09:24:16 2016   Load average: 0.04 0.10 0.08 2/467 18183    

user  :      04:11:57.53   7.3%  page in :         28756888                    
nice  :      00:00:01.60   0.0%  page out:         36141480                    
system:      06:30:32.00  11.3%  page act:          7866661                    
IOwait:      00:15:18.26   0.4%  page dea:                0                    
hw irq:      00:00:00.00   0.0%  page flt:        160453047                    
sw irq:      00:00:43.85   0.0%  swap in :                0                    
idle  :   1d 22:22:57.16  80.9%  swap out:                0                    
uptime:   3d 23:11:59.01         context :        580731332                    

irq   0:         16  2-edge timer        irq  25:          0  1-edge dmar1     
irq   1:         12  1-edge i8042        irq  27:    1477983  327680-edge xhci_
irq   5:          0  5-edge parport0     irq  28:    1665347  512000-edge ahci[
irq   8:          1  8-edge rtc0         irq  29:         13  360448-edge mei_m
irq   9:         28  9-fasteoi acpi      irq  30:    8799990  1572864-edge enp3
irq  12:         19  12-edge i8042       irq  31:         21  49152-edge snd_hd
irq  16:        131  16-fasteoi ehci_h   irq  32:         24  32768-edge i915  
irq  17:       5678  17-fasteoi snd_hd   irq  33:        205  442368-edge snd_h
irq  23:        151  23-fasteoi ehci_h   irq  34:    3051202  524288-edge nvidi
irq  24:          0  0-edge dmar0                                              

sda           900972r          641918w   sdc              938r              21w
sdb              233r             280w                                         

enp3s0      TX 3.63GiB       RX 6.64GiB       lo          TX 9.65MiB       RX 9.65MiB

Per quanto riguarda le varie opzioni, leggete la pagina man; ma sono queste:

$ procinfo -h
procinfo version 2.0 $Rev: 304 $
usage: procinfo [-sidDSbhHv] [-nN]

    -nN    pause N second between updates (implies -f)
    -d    show differences rather than totals (implies -f)
    -D    show current memory/swap usage, differences on rest
    -S    with -nN and -d/-D, always show values per second
    -b    show number of bytes instead of requests for disk statistics
    -H    show memory stats in KiB/MiB/GiB
    -r    show memory usage -/+ buffers/cache
    -s    Don't skip netdevs in /etc/procinfo/skipIfaces
    -h    print this help
    -v    print version info

Per quanto riguarda il dettaglio delle varie info:

Memory:
              See the man page for free(1)

       Bootup:
              The time the system was booted.

       Load average:
              The  average  number  of  jobs  running,  followed by the number of runnable processes and the total number of processes, followed by the PID of the last process run. The pid of the last running
              process will probably always be procinfo's PID.

       user:  The amount of time spent running jobs in user space.

       nice:  The amount of time spent running niced jobs in user space.

       system:
              The amount of time spent running in kernel space.  Note: the time spent servicing interrupts is not counted by the kernel (and nothing that procinfo can do about it).

       idle:  The amount of time spent doing nothing.

       uptime:
              The time that the system has been up. The above four should more or less add up to this one.

       page in:
              The number of disk blocks paged into core from disk. 1 block is equal to 1 kiB.

       page out:
              The number of disk blocks paged out of core to disk. This includes regular disk-writes.

       swap in:
              The number of memory pages paged in from swap.

       swap out:
              The number of memory pages paged out to swap.

       context:
              The number of context switches, either since bootup or per interval.

       Disk stats(hda, hdb, sda, sdb):
              The number of reads and writes made to disks, whether CD-ROM, hard-drive, or USB.  Shows all disks if they either are an hdX or sdX, or if they have a non-zero read/write count.

       Interrupts:
              Number of interrupts serviced since boot, or per interval, listed per IRQ.

E' un bel programmino, anche se va sicuramente studiato un attimo per capire bene le varie informazioni che tira fuori.

Enjoy!