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我的疑问 & 我的解决方案

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You would have to run this as root (hence the sudo):

for user in $(cut -f1 -d: /etc/passwd); do echo $user; sudo crontab -u $user -l; done

will loop over each user name listing out their crontab. The crontabs are owned by the respective users so you won't be able to see another user's crontab w/o being them or root.

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Use leftmargin=*

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\documentclass{article}
\usepackage{enumitem}
\usepackage{showframe}
\begin{document}
\begin{enumerate}[label=\bfseries Step \arabic*:,leftmargin=*]
  \item Elliptic Key Creation :
  \item Exchange of Public Elliptic keys
  \item MasterSecret Computation
\end{enumerate}
\end{document}

Or set a proper itemindent if you want to control the indent.

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\documentclass{article}
\usepackage{enumitem}
\usepackage{showframe}
\begin{document}
\begin{enumerate}[label=\bfseries Step~\arabic*:,itemindent=3em]
  \item Elliptic Key Creation : 
  \item Exchange of Public Elliptic keys
  \item MasterSecret Computation
\end{enumerate}
\end{document}

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The enumitem package has an inline option which implements inline versions of the standard lists using starred versions of the basic list environments. As with other enumitem lists, labels and (horizontal) spacing can be set with key values as well as custom settings for the elements between the list items (typically punctuation).

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\documentclass{article}
\usepackage[inline]{enumitem}

\begin{document}

Text before list.
\begin{enumerate*}
  \item My first in list.
  \item My second in list.
\end{enumerate*}
Text after list.

\end{document}

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Journal Indexes

SCIE/SSCI/AHCI/ESCI Journals: https://mjl.clarivate.com/home

ISI Journals: https://isindexing.com/isi/journals.php

Ei Compendex: https://www.elsevier.com/solutions/engineering-village/content/compendex

To download the list of Ei journals and proceedings in Excel format:

  1. Click on this link.
  2. Click on "Compendex source list".

Journal Ranking and Impact Factors

Check the JCR (Journal Citation Report) ranking of a journal and its impact factor (requires a subscription): https://jcr.clarivate.com/jcr/home

Check SCImago Journal Ranking (SJR) in terms of quartile Q1, Q2, Q3, Q4: https://www.scimagojr.com/

Check Chinese Academy of Science journal ranking (中科院分区) using LetPub in terms of quartile Q1, Q2, Q3, Q4: http://www.letpub.com.cn/index.php?page=journalapp

Check the Chinese Computer Federation (CCF) recommended list of international conferences and periodicals: https://www.ccf.org.cn/Academic_Evaluation/By_category/

Citations

Search for citations in the Web of Science (also called Web of Knowledge, requires a subscription): http://www.webofknowledge.com/

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When using Windows PowerShell, it's possible to use a PowerShell module. Copy and paste the following PowerShell script that retrieves the latest version of the desired module and then recursively uninstalls the previous versions installed. Interesting to note, you can use the -WhatIf parameter at the end to simulate and preview the changes without doing them (remember to remove -WhatIf parameter when you want to apply the changes and to set the $ModuleName to the desired PowerShell module).

$ModuleName = 'oh-my-posh';
$Latest = Get-InstalledModule $ModuleName; 
Get-InstalledModule $ModuleName -AllVersions | ? {$_.Version -ne $Latest.Version} | Uninstall-Module -WhatIf

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Here's how you can do; which one to choose between the second and third example is a matter of taste and of what your pictures contain.

The frame option draws a frame with rule of width \fboxrule (by default) and zero space between the frame and the box. But the rule width is added to the width of the box, so you have to do something about it: either reduce a bit the width of the box, or draw the frame inside the box, by specifying a negative separation (second parameter to the frame option).

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\documentclass{article}
\usepackage[export]{adjustbox}
\usepackage{graphicx}
\setlength{\parindent}{0pt} % just for the example

\begin{document}

\footnotesize

% first example: bad, there's an overfull of twice the rule width    
\verb|\includegraphics[width=\textwidth,frame]{tiger}|\\
\begin{minipage}{4cm}
\includegraphics[width=\textwidth,frame]{tiger}
\end{minipage}

\medskip

% second example: good, the frame is drawn outside the picture
\verb|\includegraphics[width=\dimexpr\textwidth-2\fboxrule,frame={\fboxrule}]{tiger}|\\
\begin{minipage}{4cm}
\includegraphics[width=\textwidth-2\fboxrule,frame={\fboxrule}]{tiger}
\end{minipage}

\medskip

% third example: good, the frame is drawn inside the picture
\verb|\includegraphics[width=\textwidth,frame={\fboxrule} {-\fboxrule}]{tiger}|\\
\begin{minipage}{4cm}
\includegraphics[width=\textwidth,frame={\fboxrule} {-\fboxrule}]{tiger}
\end{minipage}
\end{document}

Don't include the minipage environments, they are just to show the effect while using \textwidth (that's reset in a minipage) and not having a huge picture of the result.

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You can use something called "bash parameter expansion" to accomplish this.

To get the assigned value, or default if it's missing:

# If variable not set or null, use default.
FOO="${VARIABLE:-default}"

Or to assign default to VARIABLE at the same time:

# If variable not set or null, set it to default.
FOO="${VARIABLE:=default}"