Commands by amishaa (0)

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Put public IP address in a variable

Create a tar archive using 7z compression
Using 7z to create archives is OK, but when you use tar, you preserve all file-specific information such as ownership, perms, etc. If that's important to you, this is a better way to do it.

lazy SQL QUERYING
This is regarding the command 8263 using an alias to fill in command line options for psql. You can actually just type 'psql'. In order for that to work, you want to set environment variables PGDATABASE, PGHOST, PGUSER, and (except you're using the default) PGPORT. Also, you can add a line "host:port:dbname:user:password" (asterisk ok in some columns) to your ~/.pgpass file. Finally, if you don't like the aligned columns, you can add the line "\pset format unaligned" to your ~/.psqlrc file.

Human readable directory sizes for current directory, sorted descending

See system users

using `!#$' to referance backward-word
expand to: cp /work/host/phone/ui/main.cpp /work/target/phone/ui/main.cpp !# The entire command line typed so far.

Just convert your all books DJVU format to PDF, with one line

Show the UUID of a filesystem or partition
Shows the UUID of the given partition (here /dev/sda7). Doesn't need to be root.

make image semi-transparent

generate random mac address

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