rustup-update

james@james-Streacom  ~/Archive  rustup update
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'
info: latest update on 2018-04-19, rust version 1.27.0-nightly (ac3c2288f 2018-04-18)
info: downloading component 'rustc'
 73.1 MiB /  73.1 MiB (100 %)   1.4 MiB/s ETA:   0 s                
info: downloading component 'rust-std'
 57.9 MiB /  57.9 MiB (100 %)   1.4 MiB/s ETA:   0 s                
info: downloading component 'cargo'
  4.3 MiB /   4.3 MiB (100 %)   1.3 MiB/s ETA:   0 s                
info: downloading component 'rust-docs'
  8.7 MiB /   8.7 MiB (100 %)   1.4 MiB/s ETA:   0 s                
info: downloading component 'rls-preview'
  5.2 MiB /   5.2 MiB (100 %)   1.4 MiB/s ETA:   0 s                
info: downloading component 'rust-src'
  2.8 MiB /   2.8 MiB (100 %)   1.4 MiB/s ETA:   0 s                
info: downloading component 'rust-analysis'
info: removing component 'rustc'
info: removing component 'rust-std'
info: removing component 'cargo'
warning: during uninstall component cargo-x86_64-unknown-linux-gnu was not found
info: removing component 'rust-docs'
info: removing component 'rls-preview'
info: removing component 'rust-src'
info: removing component 'rust-analysis'
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: rolling back changes
error: could not rename component directory from '/home/james/.rustup/tmp/9qsrml14otudsvt9_dir/bk' to '/home/james/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu'
error: failed to install component: 'cargo-x86_64-unknown-linux-gnu', detected conflict: '"share/man/man1/cargo-update.1"'
info: checking for self-updates

       stable-x86_64-unknown-linux-gnu unchanged - rustc 1.25.0 (84203cac6 2018-03-25)
  nightly-x86_64-unknown-linux-gnu update failed - rustc 1.27.0-nightly (056f589fb 2018-04-07)

take-2

 james@james-Streacom  ~  rustup update
info: syncing channel updates for 'stable-x86_64-unknown-linux-gnu'
info: syncing channel updates for 'nightly-x86_64-unknown-linux-gnu'
258.3 KiB / 258.3 KiB (100 %) 119.3 KiB/s ETA:   0 s                
info: latest update on 2018-04-19, rust version 1.27.0-nightly (ac3c2288f 2018-04-18)
info: downloading component 'rustc'
info: downloading component 'rust-std'
info: downloading component 'cargo'
info: downloading component 'rust-docs'
info: downloading component 'rustfmt-preview'
  3.6 MiB /   3.6 MiB (100 %) 909.3 KiB/s ETA:   0 s                
info: downloading component 'rls-preview'
info: downloading component 'rust-src'
info: downloading component 'rust-analysis'
info: removing component 'rustc'
info: removing component 'rust-std'
info: removing component 'cargo'
warning: during uninstall component cargo-x86_64-unknown-linux-gnu was not found
info: removing component 'rust-docs'
info: removing component 'rustfmt-preview'
info: removing component 'rls-preview'
info: removing component 'rust-src'
info: removing component 'rust-analysis'
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: rolling back changes
error: could not rename component directory from '/home/james/.rustup/tmp/w0bi6u37tt6ix6wj_dir/bk' to '/home/james/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu'
error: failed to install component: 'cargo-x86_64-unknown-linux-gnu', detected conflict: '"share/man/man1/cargo-update.1"'
info: checking for self-updates

       stable-x86_64-unknown-linux-gnu unchanged - rustc 1.25.0 (84203cac6 2018-03-25)
  nightly-x86_64-unknown-linux-gnu update failed - rustc 1.27.0-nightly (056f589fb 2018-04-07)