Bash – List partition type GUID’s for all disks from command line

bashblock-devicecommand linedisk

I need to list the partition type GUID's from the command line.

Note: This is not the same as the partition UUID.

Basically I'm needing to search for all disks that have the Ceph OSD type GUID:

4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D

The intention is to emulate some things done with ceph-disk (python) in bash script on CoreOS. Why? so I can mount them to the appropriate place automatically with ceph-docker.

Best Answer

This was my ultimate solution using blkid -p

function find_osds()
{
    local osds
    declare -a dev_list
    mapfile dev_list < <(lsblk -l -n -o NAME --exclude 1,7,11) # note -I not available in all versions of lsblk, use exclude instead
    for dev in "${dev_list[@]}"; do
        dev=/dev/$(trim "$dev")
        if blkid -p "$dev" | fgrep -q '4fbd7e29-9d25-41b8-afd0-062c0ceff05d'; then
            osds+=($dev)
        fi
    done
    echo "${osds[@]}"
}

Related Solutions

Command-line mv exclusion list

You can use the advanced globbing patterns in some shells to match all the files in a directory except for those matching a particular pattern. For example, in ksh, bash or zsh, the command
```
shopt -s extglob   ## needed in bash only
setopt ksh_glob   ## needed in zsh only
mv /source/!(*.bak) /destination
```
will move all files in /source to /destination except for the files matching *.bak. In zsh, you can also write /source/^*.bak if you first run setopt extended_glob, and more generally (again requiring setopt extended_glob) /source/*~*.bak (or /source/a*~*.bak for all files whose name begins with a except for .bak files, etc).
Zsh has a mass copy/move/link command that can be used, amongst others, to move all files except for those matching a pattern. For example, the following command moves all files except *.bak from /source to target, and adds .bak to their name in the process:
```
autoload zmv
zmv '/source/(*)~*.bak' '/target/$1.bak'
```
There are several commands called rename floating around. On Debian and Ubuntu, /usr/bin/rename is a perl script that moves files to a new name generated by a perl expression. You can exclude files from renaming by not generating a new name if the file is to be excluded. For example, the following command (using this particular rename program) moves all files except *.bak from /source to /target:
```
rename 's!/source!/target! unless m!\.bak$!' /source/*
```
You can use the find command to select the files you want to move. For example, the following command moves all regular files except *.bak in /source or a subdirectory into /target (note that the directory structure is collapsed):
```
find /source -type f \! -name '*.bak' -exec mv {} /target/ \;
```
or (more efficient if there are many files to move)
```
find /source -type f \! -name '*.bak' -exec sh -c 'mv "$@" "$0"' /target/ {} +
```
rsync is a generalization of cp and scp with very powerful include/exclude rules. For example, the following command copies all files except *.bak in /source or a subdirectory into /target, respecting the directory structure:
```
rsync -a --exclude '*.bak' /source/ /target/
```
pax is (amongst other things) another cp on steroids. Its exclusion rules are not nearly as powerful as rsync's, but it has the additional ability to rename files as they are copied. If you rename a file to the empty string, it's excluded from the copy. For example, the following command copies all files except *.bak in /source or a subdirectory into /target, and renames the files to .bak in passing.
```
cd /source && pax -rw -pp -s '/.*\.bak$//' -s '/$/.bak/' . /target/
```
The example above has the unfortunate side effect of creating directories called foo.bak, which can be avoided by combining find with pax:
```
{ cd /source && find . -type f; } | \
pax -rw -pp -s '/.*\.bak$//' -s '/$/.bak/' /target/
```

Linux Command – How to List Partition Labels from the Command Line

With udev, You can use

ls -l /dev/disk/by-label

to show the symlinks by label to at least some partition device nodes.

Not sure what the logic of inclusion is, possibly the existence of a label.

Best Answer

Related Solutions

Command-line mv exclusion list

Linux Command – How to List Partition Labels from the Command Line

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