Useful Commands/Low Level IO: Difference between revisions
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(Created page with "= File System = {| class="wikitable" ! Purpose || Command |- | list with color and suffix for dir and link | <syntaxhighlight lang="bash">ls -FG</syntaxhighlight> |- | list add hidden files only '''single quote is necessary''' | <syntaxhighlight lang="bash">find . -name '.*'</syntaxhighlight> |- | delete dist directory recursively except README.md and itself. | <syntaxhighlight lang="bash"> find ../../assets/swagger/support ! -path *swagger/support ! -name 'README.md' -d...") |
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! Purpose || Command | ! 🎯 Purpose || ⌨️ Command | ||
|- | |- | ||
| list with color and suffix for dir and link | | list with color and suffix for dir and link | ||
Latest revision as of 02:00, 17 September 2026
| 🎯 Purpose | ⌨️ Command |
|---|---|
| list with color and suffix for dir and link | ls -FG
|
| list add hidden files only single quote is necessary | find . -name '.*'
|
| delete dist directory recursively except README.md and itself. | find ../../assets/swagger/support ! -path *swagger/support ! -name 'README.md' -delete
|
| delete files that filename leads by - or -- | rm -- -X --exclude-from
|
| Set file mtime 2013-09-01 00:00:00 |
touch -t 201309010000 FILENAME
|
| create ramdisk for Linux (cannot set size) | mount -t ramfs ramfs /usr/local/ramdisk
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| create ramdisk for Linux/BSD | mount -t tmpfs -o size=128m tmpfs /usr/local/ramdisk
|
| Test I/O performance of 1G write with 4K block | dd if=/dev/zero of=100k.bin bs=4k count=262144
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| Create file with 100K size | dd if=/dev/zero of=100k.bin bs=1k count=100
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| Create file with 1M size No warning on disk full |
dd if=/dev/zero of=10m.bin bs=1m count=10
|
| Simulate memory consumption (RAM+SWAP) | mkdir /usr/local/ramdisk
mount -t tmpfs -o size=2G tmpfs /usr/local/ramdisk
dd if=/dev/zero of=/usr/local/ramdisk/fill.bin bs=1m count=2048
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