Commands by sorpigal

Commands by sorpigal (3)

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find packages installed from e.g. sid which are newer than those available from e.g. testing when sid is no longer present as a source repo

This is useful if you add sid, install some packages, then remove sid and want to work out which packages you installed from sid that should be removed (e.g. before an upgrade to the new stable). Alternatively you can think of this as "find installed packages that can no longer be installed."
This is sample output - yours may be different.
1

aptitude search -F '%p %v %V %O' '?narrow(?not(?archive("^[^n][^o].*$")),?version(CURRENT))' | while IFS=' ' read -r pkg ver candidate origin; do if [[ $ver == "$candidate" ]] && [[ $origin == '(installed locally)' ]]; then echo "$pkg"; fi; done

sorpigal · 2021-12-26 15:57:15 339
Rename .JPG to .jpg recursively

Recursively rename .JPG to .jpg using standard find and mv. It's generally better to use a standard tool if doing so is not much more difficult.
This is sample output - yours may be different.
7

find /path/to/images -name '*.JPG' -exec bash -c 'mv "$1" "${1/%.JPG/.jpg}"' -- {} \;

sorpigal · 2010-01-07 15:41:17 9
List the size (in human readable form) of all sub folders from the current location

Parsing the output of ls is never a good idea for any reason. Using find this way: - works with files that have spaces in their names. - actually lists "sub folders" and not of all files and folders. - does not break if there are a huge number of files in the current directory.
This is sample output - yours may be different.
-6

find . -maxdepth 1 -type d -not -name . -exec du -sh {} +

sorpigal · 2009-12-11 14:37:26 5

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Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

fetch all revisions of a specific file in an SVN repository

Manages everything through one sed script instead of pipes of greps and awks. Quoting of shell variables is generally easier within a sed script.

Url Encode

Converts reserved characters in a URI to their percent encoded counterparts. Alternate python version: $ echo "$url" | python -c 'import sys,urllib;print urllib.quote(sys.stdin.read().strip())'

external projector for presentations

i spent way too many hours trying to fiddle with /etc/X11/xorg.conf trying to hook up various external projectors. too bad i didn't know this would solve all my problems.

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

set a reminder for 5 days in the future

setup for reminder in 5 days, added the date in the future. To run a job at 4pm three days from now, you would do at 4pm + 3 days, to run a job at 10:00am on July 31, you would do at 10am Jul 31 and to run a job at 1am tomorrow, you would do at 1am tomorrow.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

Rename files in batch

Edit a file inside a compressed archive without extracting it

If you vim a compressed file it will list all archive content, then you can pickup any of them for editing and saving. There you have the modified archive without any extra step. It supports many file types such as tar.gz, tgz, zip, etc.

cpu info

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