구차니의 잡동사니 모음

VIRT stands for the virtual size of a process, which is the sum of memory it is actually using, memory it has mapped into itself (for instance the video card’s RAM for the X server), files on disk that have been mapped into it (most notably shared libraries), and memory shared with other processes. VIRT represents how much memory the program is able to access at the present moment.

RES stands for the resident size, which is an accurate representation of how much actual physical memory a process is consuming. (This also corresponds directly to the %MEM column.) This will virtually always be less than the VIRT size, since most programs depend on the C library.

SHR indicates how much of the VIRT size is actually sharable (memory or libraries). In the case of libraries, it does not necessarily mean that the entire library is resident. For example, if a program only uses a few functions in a library, the whole library is mapped and will be counted in VIRT and SHR, but only the parts of the library file containing the functions being used will actually be loaded in and be counted under RES. 

       --load-cookies file

           Load cookies from file before the first HTTP retrieval.  file is a

           textual file in the format originally used by Netscape's

           cookies.txt file.

           When specified, causes --save-cookies to also save session cookies.

           Session cookies are normally not saved because they are meant to be

           kept in memory and forgotten when you exit the browser.  Saving

           them is useful on sites that require you to log in or to visit the

           home page before you can access some pages.  With this option,

           multiple Wget runs are considered a single browser session as far

           as the site is concerned.

           Since the cookie file format does not normally carry session

           cookies, Wget marks them with an expiry timestamp of 0.  Wget's

           --load-cookies recognizes those as session cookies, but it might

           confuse other browsers.  Also note that cookies so loaded will be

           treated as other session cookies, which means that if you want

           --save-cookies to preserve them again, you must use

           --keep-session-cookies again. 

       --user=user

       --password=password

           Specify the username user and password password for both FTP and

           HTTP file retrieval.  These parameters can be overridden using the

           --ftp-user and --ftp-password options for FTP connections and the

           --http-user and --http-password options for HTTP connections. 

stty -speed 19200 -f /dev/ttyS1

echo -ne '\033[2J' > /dev/ttyS1

cat -v < /dev/ttyS1 

# stty --help

BusyBox v1.20.2 (2015-12-21 15:35:08 KST) multi-call binary.

Usage: stty [-a|g] [-F DEVICE] [SETTING]...

Without arguments, prints baud rate, line discipline,

and deviations from stty sane

        -F DEVICE       Open device instead of stdin

        -a              Print all current settings in human-readable form

        -g              Print in stty-readable form

        [SETTING]       See manpage 

# stty -a -F /dev/ttyAMA2

speed 9600 baud;stty: /dev/ttyAMA2

 line = 0;

intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;

eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;

werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;

-parenb -parodd cs8 hupcl -cstopb cread clocal -crtscts

-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff

-iuclc -ixany -imaxbel -iutf8

opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0

isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt

echoctl echoke 

# stty -F /dev/ttyAMA2 speed 115200

9600 

# stty -a -F /dev/ttyAMA2

speed 115200 baud;stty: /dev/ttyAMA2

 line = 0;

intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;

eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;

werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;

-parenb -parodd cs8 hupcl -cstopb cread clocal -crtscts

-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff

-iuclc -ixany -imaxbel -iutf8

opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0

isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt

echoctl echoke 

# stty -F /dev/ttyAMA2 min 0 time 10 

$ cpulimit

Error: You must specify a target process

CPUlimit version 2.1

Usage: cpulimit TARGET [OPTIONS...] [-- PROGRAM]

   TARGET must be exactly one of these:

      -p, --pid=N        pid of the process

      -e, --exe=FILE     name of the executable program file

                         The -e option only works when

                         cpulimit is run with admin rights.

      -P, --path=PATH    absolute path name of the

                         executable program file

   OPTIONS

      -b  --background   run in background

      -c  --cpu=N        override the detection of CPUs on the machine.

      -l, --limit=N      percentage of cpu allowed from 1 up.

                         Usually 1 - 400, but can be higher

                         on multi-core CPUs (mandatory)

      -q, --quiet        run in quiet mode (only print errors).

      -k, --kill         kill processes going over their limit

                         instead of just throttling them.

      -r, --restore      Restore processes after they have

                         been killed. Works with the -k flag.

      -s, --signal=SIG   Send this signal to the watched process when cpulimit exits.

                         Signal should be specificed as a number or

                         SIGTERM, SIGCONT, SIGSTOP, etc. SIGCONT is the default.

      -v, --verbose      show control statistics

      -z, --lazy         exit if there is no suitable target process,

                         or if it dies

          --             This is the final CPUlimit option. All following

                         options are for another program we will launch.

      -h, --help         display this help and exit 

<item>

core

limits the core file size (KB)

data

maximum data size (KB)

fsize

maximum filesize (KB)

memlock

maximum locked-in-memory address space (KB)

nofile

maximum number of open files

rss

maximum resident set size (KB) (Ignored in Linux 2.4.30 and higher)

stack

maximum stack size (KB)

cpu

maximum CPU time (minutes)

nproc

maximum number of processes

as

address space limit (KB)

maxlogins

maximum number of logins for this user except for this with uid=0

maxsyslogins

maximum number of all logins on system

priority

the priority to run user process with (negative values boost process priority)

locks

maximum locked files (Linux 2.4 and higher)

sigpending

maximum number of pending signals (Linux 2.6 and higher)

msgqueue

maximum memory used by POSIX message queues (bytes) (Linux 2.6 and higher)

nice

maximum nice priority allowed to raise to (Linux 2.6.12 and higher) values: [-20,19]

rtprio

maximum realtime priority allowed for non-privileged processes (Linux 2.6.12 and higher) 

  Update Mozilla certificate authority bundle to version 2.9.

    The following certificate authorities were added (+):

    + "Certplus Root CA G1"

    + "Certplus Root CA G2"

    + "Certum Trusted Network CA 2"

    + "Hellenic Academic and Research Institutions ECC RootCA 2015"

    + "Hellenic Academic and Research Institutions RootCA 2015"

    + "ISRG Root X1"

    + "OpenTrust Root CA G1"

    + "OpenTrust Root CA G2"

    + "OpenTrust Root CA G3"

    + "SZAFIR ROOT CA2"

    The following certificate authorities were removed (-):

    - "CA Disig"

    - "NetLock Business (Class B) Root"

    - "NetLock Express (Class C) Root"

    - "NetLock Notary (Class A) Root"

    - "NetLock Qualified (Class QA) Root"

    - "Sonera Class 1 Root CA"

    - "Staat der Nederlanden Root CA"

    - "Verisign Class 1 Public Primary Certification Authority - G2"

    - "Verisign Class 3 Public Primary Certification Authority"

    - "Verisign Class 3 Public Primary Certification Authority - G2"

 -- Michael Shuler <michael@pbandjelly.org>  Fri, 18 Nov 2016 09:09:47 -0600 

$ stat sshd_config

  File: ‘sshd_config’

  Size: 2551            Blocks: 8          IO Block: 4096   regular file

Device: b302h/45826d    Inode: 110939      Links: 1

Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)

Access: 2017-01-01 07:05:20.413654980 +0900

Modify: 2017-01-01 07:05:20.413654980 +0900

Change: 2017-01-01 07:05:20.433654929 +0900

 Birth: - 

$ sudo debugfs -R "stat /etc/ssh/sshd_config" /dev/mmcblk0p2

debugfs 1.42.12 (29-Aug-2014)

Inode: 110939   Type: regular    Mode:  0644   Flags: 0x80000

Generation: 2068774389    Version: 0x00000000:00000001

User:     0   Group:     0   Size: 2551

File ACL: 0    Directory ACL: 0

Links: 1   Blockcount: 8

Fragment:  Address: 0    Number: 0    Size: 0

 ctime: 0x58682ba0:67643244 -- Sun Jan  1 07:05:20 2017

 atime: 0x58682ba0:629f7f10 -- Sun Jan  1 07:05:20 2017

 mtime: 0x58682ba0:629f7f10 -- Sun Jan  1 07:05:20 2017

crtime: 0x58682ba0:629f7f10 -- Sun Jan  1 07:05:20 2017

Size of extra inode fields: 32

EXTENTS:

(0):1031812

(END)