Commands tagged fold (10)

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Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Test disk I/O
Especially useful to gauge the performance of a VPS.

Sed can refference parts of the pattern in the replacement:

strip non-constant number of directories from tar archive while decompressing
If you want to decompress the files from an archive to current directory by stripping all directory paths, use --transform option to strip path information. Unfortunately, --strip-components option is good if the target files have same and constant depth of folders. The idea was taken from http://www.unix.com/solaris/145941-how-extract-files-tar-file-without-creating-directories.html

Batch Convert SVG to PNG (in parallel)
Convert some SVG files into PNG using ImageMagick's convert command. Run the conversions in parallel to save time. This is safer than robinro's forkbomb approach :-) xargs runs four processes at a time -P4

check open ports without netstat or lsof

Generate random valid mac addresses
Ruby version. Also, a perl version: $perl -e 'printf("%.2x.",rand(255))for(1..5);printf("%.2x\n",rand(255))'

Put a console clock in top right corner
This puts a clock in the top right of the terminal. This version doesn't use tput, but uses escape codes

list block devices
Shows all block devices in a tree with descruptions of what they are.

get all Google ipv4 subnets for a iptables firewall for example


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