ac (報告用戶連接的時間)

方磚大叔發(fā)表于 2020-06-17 14:37

瀏覽次數(shù)：

命令行 Unix&Linux命令 ac

在手機(jī)上閱讀

釋放雙眼，帶上耳機(jī)，聽聽看~！

00:00

ac命令根據(jù)當(dāng)前的/var/log/wtmp文件中的登錄進(jìn)入和退出來報告用戶連接的時間（小時）,如果不使用標(biāo)志,則報告總的時間,也就是統(tǒng)計用戶的在線時間。

查看英文版

1 ac 運行系統(tǒng)環(huán)境

2 ac 描述

3 ac 語法

4 ac 選項

5 ac 示例

6 相關(guān)命令

ac 運行系統(tǒng)環(huán)境

ac 描述

ac根據(jù)當(dāng)前wtmp文件中的登錄/注銷打印出連接時間（以小時為單位）的報告。總計也被打印出來。

計費文件wtmp通過init和login維護(hù)。 ac和login都不會創(chuàng)建wtmp（如果它不存在），則不會進(jìn)行任何記帳。要開始計算，請創(chuàng)建長度為零的文件。

GNU ac幾乎與Unix ac相同，盡管它在多種方面更智能。

因此，您應(yīng)該期望GNU ac的輸出與其他系統(tǒng)上ac的輸出有所不同。使用命令信息計費來獲取其他信息。

查看英文版

ac 語法

ac [ -d | --daily-totals ] [ -y | --print-year ] [ -p | --individual-totals ] 
   [ people ] [ -f | --file file name ] [ -a | --all-days ] [ --complain ] 
   [ --reboots ] [ --supplants ] [ --timewarps ] [ --compatibility ] 
   [ --tw-leniency num ] [ --tw-suspicious num ] [ -z | --print-zeros ] 
   [ --debug ] [ -V | --version ] [ -h | --help ]

ac [ -d | --daily-totals ] [ -y | --print-year ] [ -p | --individual-totals ] 
   [ people ] [ -f | --file file name ] [ -a | --all-days ] [ --complain ] 
   [ --reboots ] [ --supplants ] [ --timewarps ] [ --compatibility ] 
   [ --tw-leniency num ] [ --tw-suspicious num ] [ -z | --print-zeros ] 
   [ --debug ] [ -V | --version ] [ -h | --help ]

查看英文版

ac 選項

-d, --daily-totals	按每天的統(tǒng)計數(shù)據(jù)打印。輸出格式如下: Jul 3 total 1.17Jul 4 total 2.10Jul 5 total 8.23Jul 6 total 2.10Jul 7 total 0.30
-p, --individual-totals	打印每個賬號的總的連接時間。輸出格式如下： bob 8.06goff 0.60maley 7.37root 0.12total 16.15
people	打印出人員中所有用戶使用的連接時間的總和。請注意，人員是用空格分隔的有效用戶名列表。不允許使用通配符。
-f, --file file name	從文件文件名而不是系統(tǒng)的wtmp文件讀取。
--complain	當(dāng)wtmp文件有問題（時間扭曲，缺少記錄或其他原因）時，請打印出適當(dāng)?shù)腻e誤。
--reboots	重新引導(dǎo)記錄不是在重新引導(dǎo)時寫入的，而是在系統(tǒng)重新引導(dǎo)時寫入的；因此，不可能確切知道重新啟動的時間。用戶可能已在重新引導(dǎo)時登錄到系統(tǒng)，并且許多ac會根據(jù)用戶自動計算從登錄到重新引導(dǎo)記錄之間的時間（即使所有時間都不應(yīng)該如此，如果系統(tǒng)是例如長時間停機(jī)）。如果要計算這次，請包括該標(biāo)志。為了最大程度地兼容所有版本的ac，請包含此標(biāo)志。
--supplants	有時，沒有為特定終端寫入注銷記錄，因此無法計算最后一個用戶的累積時間。如果要包括從用戶登錄到終端上下次登錄的時間（雖然可能不正確），請包含此信息，您要包括從用戶登錄到終端上下一次登錄的時間（盡管可能不正確），包括這個標(biāo)志。為了最大程度地兼容所有版本的ac，請包含此標(biāo)志。
--timewarps	有時，wtmp文件中的條目會突然跳回過去，而不會發(fā)生時鐘更改記錄。發(fā)生這種情況時，無法知道用戶登錄了多長時間。如果要計算用戶登錄和時間扭曲之間的時間，請包含此標(biāo)志。為了最大程度地兼容所有版本的ac，請包含此標(biāo)志。
--compatibility	這是鍵入以上三個選項的簡寫。
-a, --all-days	如果要打印每日總計，請每天打印一條記錄，而不要跳過沒有登錄活動的中間日期。如果沒有此標(biāo)志，則在這幾天之間的累積時間將在登錄活動的第二天下列出。
--tw-leniency num	將時間扭曲寬大度設(shè)置為num秒。 wtmp文件中的記錄可能會有些混亂（最值得注意的是，在一秒內(nèi)發(fā)生兩次登錄；第二次登錄首先寫入）。默認(rèn)情況下，此值設(shè)置為60。如果程序注意到此問題，除非使用--timewarps標(biāo)志，否則不會為用戶分配時間。
--tw-suspicious num	將時間扭曲可疑值設(shè)置為num秒。如果wtmp文件中的兩條記錄相隔的間隔時間超過此秒數(shù)，則wtmp文件存在問題（或者您的機(jī)器一年未使用過）。如果程序注意到此問題，則除非使用--timewarps標(biāo)志，否則不會將時間分配給用戶。
-y, --print-year	在顯示日期的時候輸出年份。
-z, --print-zeros	如果任何類別的總計（總計除外）為零，請打印出來。默認(rèn)設(shè)置是禁止打印。
--debug	打印詳細(xì)的內(nèi)部信息。
-V, --version	將ac的版本號打印到標(biāo)準(zhǔn)輸出并退出。
-h, --help	將使用情況字符串和系統(tǒng)文件的默認(rèn)位置打印到標(biāo)準(zhǔn)輸出并退出。

-d, --daily-totals	Print totals for each day rather than just one big total at the end. The output looks like this: Jul 3 total 1.17Jul 4 total 2.10Jul 5 total 8.23Jul 6 total 2.10Jul 7 total 0.30
-p, --individual-totals	Print time totals for each user in addition to the usual everything-lumped-into-one value. It looks like: bob 8.06goff 0.60maley 7.37root 0.12total 16.15
people	Print out the sum total of the connect time used by all of the users included in people. Note that people is a space separated list of valid user names; wildcards are not allowed.
-f, --file file name	Read from the file file name instead of the system's wtmp file.
--complain	When the wtmp file has a problem (a time-warp, missing record, or whatever), print out an appropriate error.
--reboots	Reboot records are NOT written at the time of a reboot, but when the system restarts; therefore, it is impossible to know exactly when the reboot occurred. Users may have been logged into the system at the time of the reboot, and many ac's automatically count the time between the login and the reboot record against the user (even though all of that time shouldn't be, perhaps, if the system is down for a long time, for instance). If you want to count this time, include the flag. For maximum compatibility with all versions of ac, include this flag.
--supplants	Sometimes, a logout record is not written for a specific terminal, so the time that the last user accrued cannot be calculated. If you want to include the time from the user's login to the next login on the terminal (though probably incorrect), include this you want to include the time from the user's login to the next login on the terminal (though probably incorrect), include this flag. For maximum compatibility with all versions of ac, include this flag.
--timewarps	Sometimes, entries in a wtmp file will suddenly jump back into the past without a clock change record occurring. It is impossible to know how long a user was logged in when this occurs. If you want to count the time between the login and the time warp against the user, include this flag. For maximum compatibility with all versions of ac, include this flag.
--compatibility	This is shorthand for typing out the three above options.
-a, --all-days	If printing daily totals, print a record for every day instead of skipping intervening days where there is no login activity. Without this flag, time accrued during those intervening days gets listed under the next day where there is login activity.
--tw-leniency num	Set the time warp leniency to num seconds. Records in wtmp files might be slightly out of order (most notably when two logins occur within a one-second period; the second one gets written first). By default, this value is set to 60. If the program notices this problem, time is not assigned to users unless the --timewarps flag is used.
--tw-suspicious num	Set the time warp suspicious value to num seconds. If two records in the wtmp file are farther than this number of seconds apart, there is a problem with the wtmp file (or your machine hasn't been used in a year). If the program notices this problem, time is not assigned to users unless the --timewarps flag is used.
-y, --print-year	Print year when displaying dates.
-z, --print-zeros	If a total for any category (other than the grand total) is zero, print it. The default is to suppress printing.
--debug	Print verbose internal information.
-V, --version	Print the version number of ac to standard output and quit.
-h, --help	Prints the usage string and default locations of system files to standard output and exits.

查看英文版

ac 示例

ac -d -y

以年份作為日期的一部分顯示每日結(jié)果，類似于以下示例：

Mar  6 2013	total       45.41
Mar  7 2013	total       69.84
Mar  8 2013	total       50.96
Mar 10 2013	total       37.69
Mar 11 2013	total        2.21
Mar 12 2013	total       10.20
Mar 14 2013	total       48.00
Mar 15 2013	total       34.34
Mar 16 2013	total       56.76
Mar 17 2013	total       66.41
Mar 18 2013	total       70.18
Mar 19 2013	total       40.90
Mar 20 2013	total       21.29
Mar 23 2013	total      156.54
Mar 24 2013	total       67.71
Today		total      133.35

ac -d -y

Display daily results with the year as part of the date, similar to the example below:

Mar  6 2013	total       45.41
Mar  7 2013	total       69.84
Mar  8 2013	total       50.96
Mar 10 2013	total       37.69
Mar 11 2013	total        2.21
Mar 12 2013	total       10.20
Mar 14 2013	total       48.00
Mar 15 2013	total       34.34
Mar 16 2013	total       56.76
Mar 17 2013	total       66.41
Mar 18 2013	total       70.18
Mar 19 2013	total       40.90
Mar 20 2013	total       21.29
Mar 23 2013	total      156.54
Mar 24 2013	total       67.71
Today		total      133.35

查看英文版

其他命令行

apt-cache | apt-get | ar | arch | arp | as | a2p | aspell | at | awk | adduser | a2p | apropos | alias | agrep | addgroup |

如此好文，分享給朋友