docs: Update install commands
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@ -37,10 +37,10 @@ For now, we can use Cargo to install the CLI.
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cargo install --git https://github.com/project-serum/anchor --tag v0.4.0 anchor-cli --locked
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```
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On Linux systems you may need to install additional dependencies. On Ubuntu,
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On Linux systems you may need to install additional dependencies if `cargo install` fails. On Ubuntu,
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```bash
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sudo apt-get install -y pkg-config build-essential libudev-dev
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sudo apt-get update && apt-get upgrade && apt-get install -y pkg-config build-essential libudev-dev
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```
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To install the JavaScript package.
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@ -57,10 +57,12 @@ If you look at the `Cargo.toml` for this example, you'll see
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Often it's useful for a program to sign instructions. For example, if a program controls a token
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account and wants to send tokens to another account, it must sign. In Solana, this is done by specifying
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"signer seeds" on CPI (TODO: add link to docs). To do this using the example above, simply change
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"signer seeds" on CPI. To do this using the example above, simply change
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`CpiContext::new(cpi_accounts, cpi_program)` to
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`CpiContext::new_with_signer(cpi_accounts, cpi_program, signer_seeds)`.
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For more background on signing with program derived addresses, see the official Solana [documentation](https://docs.solana.com/developing/programming-model/calling-between-programs#program-signed-accounts).
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## Return values
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Solana currently has no way to return values from CPI, alas. However, one can approximate this
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