linux cat create a txt file by EOF

EOF is a token that tells the cat command to terminate when it sees such a token in the subsequent lines.

cat > readme.txt << EOF

This is an input stream literal EOF

Followed by CTRL+D to terminate the command:

cat > readme.txt This is a readme file. This is a new line.

 

Append to an existing file, we can use the “>>” operator:

cat >> readme.txt
This is an appended line.

powershell set-alias grep select-string

Destination: using grep in powershell like docker ps | grep "container-name"  

1. Powershell set-alias:
    Set-Alias -name grep -value Select-String

2. Try: docker ps -a | grep kind

PS C:\test> help select-string

名前

    Select-String

概要

    Finds text in strings and files.

構文

    Select-String [-Pattern] <System.String[]> [-AllMatches] [-CaseSensitive] [-Context <System.Int32[]>] [-Encoding {ASCII | BigEndianUnicode | Default | OEM | Unicode | UTF7 | UTF8 | UTF32}] [-Exclude <System.String[]>] [-Include <System.String[]>] -InputObject <System.Management.Autom

    ation.PSObject> [-List] [-NotMatch] [-Quiet] [-SimpleMatch] [<CommonParameters>]

    Select-String [-Pattern] <System.String[]> [-AllMatches] [-CaseSensitive] [-Context <System.Int32[]>] [-Encoding {ASCII | BigEndianUnicode | Default | OEM | Unicode | UTF7 | UTF8 | UTF32}] [-Exclude <System.String[]>] [-Include <System.String[]>] [-List] -LiteralPath <System.String[]

    > [-NotMatch] [-Quiet] [-SimpleMatch] [<CommonParameters>]

    Select-String [-Pattern] <System.String[]> [-Path] <System.String[]> [-AllMatches] [-CaseSensitive] [-Context <System.Int32[]>] [-Encoding {ASCII | BigEndianUnicode | Default | OEM | Unicode | UTF7 | UTF8 | UTF32}] [-Exclude <System.String[]>] [-Include <System.String[]>] [-List] [-NotMatch] [-Quiet] [-SimpleMatch] [<CommonParameters>]

説明

    The `Select-String` cmdlet uses regular expression matching to search for text patterns in input strings and files. You can use `Select-String

    ` similar to `grep` in UNIX or `findstr.exe` in Windows.

    `Select-String` is based on lines of text. By default, `Select-String` finds the first match in each line and, for each match, it displays the

     file name, line number, and all text in the line containing the match. You can direct `Select-String` to find multiple matches per line, disp

    lay text before and after the match, or display a Boolean value (True or False) that indicates whether a match is found.

    `Select-String` can display all the text matches or stop after the first match in each input file. `Select-String` can be used to display all

    text that doesn't match the specified pattern.

    You can also specify that `Select-String` should expect a particular character encoding, such as when you're searching files of Unicode text.

    `Select-String` uses the byte-order-mark (BOM) to detect the encoding format of the file. If the file has no BOM, it assumes the encoding is U

    TF8.

関連するリンク

    Online Version: https://docs.microsoft.com/powershell/module/microsoft.powershell.utility/select-string?view=powershell-5.1&WT.mc_id=ps-gethel

    p

    about_Automatic_Variables

    about_Comparison_Operators

    about_Functions

    about_Quoting_Rules

    about_Regular_Expressions

    Get-Alias

    Get-ChildItem

    Get-Command

-- More  --