updated README.md
- signed-off-by: trimstray <trimstray@gmail.com>
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README.md
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README.md
@ -443,24 +443,34 @@ column -c3 -s " " -t | \
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sort -nr | nl | head -n 20
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```
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###### Empty a file (truncate to 0 size)
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```bash
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>filename
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```
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###### Quickly backup a file
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```bash
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cp filename{,.orig}
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```
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###### Empty a file (truncate to 0 size)
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```bash
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>filename
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```
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###### Delete all files in a folder that don't match a certain file extension
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```bash
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rm !(*.foo|*.bar|*.baz)
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```
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###### Pass multi-line string to a file
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```bash
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# cat >filename ... - overwrite file
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# cat >>filename ... - append to file
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cat > filename << __EOF__
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data data data
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__EOF__
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```
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###### Edit a file on a remote host using vim
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```bash
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@ -1039,6 +1049,12 @@ dd <dd_params> status=progress
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watch --interval 5 killall -USR1 dd
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```
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###### Redirect output to a file with dd
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```bash
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echo "string" | dd of=filename
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```
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<a name="http-https"><b>HTTP/HTTPS</b></a>
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##### Tool: [curl](https://curl.haxx.se)
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