feh, hostname, fc, ssh-add: move to common (#6487)

pages/linux/ssh-add.md

@@ -1,24 +0,0 @@
-# ssh-add
-
-> Manage loaded ssh keys in the ssh-agent.
-> Ensure that ssh-agent is up and running for the keys to be loaded in it.
-
-- Add the default ssh keys in `~/.ssh` to the ssh-agent:
-
-`ssh-add`
-
-- Add a specific key to the ssh-agent:
-
-`ssh-add {{path/to/private_key}}`
-
-- List fingerprints of currently loaded keys:
-
-`ssh-add -l`
-
-- Delete a key from the ssh-agent:
-
-`ssh-add -d {{path/to/private_key}}`
-
-- Delete all currently loaded keys from the ssh-agent:
-
-`ssh-add -D`

pages/osx/fc.md

@@ -1,16 +0,0 @@
-# fc
-
-> Open the most recent command and edit it.
-> More information: <https://ss64.com/osx/fc.html>.
-
-- Open in the default system editor:
-
-`fc`
-
-- Specify an editor to open with:
-
-`fc -e {{'emacs'}}`
-
-- List recent commands from history:
-
-`fc -l`

pages/osx/feh.md

@@ -1,28 +0,0 @@
-# feh
-
-> Lightweight image viewing utility.
-> More information: <https://github.com/derf/feh>.
-
-- View images locally or using a URL:
-
-`feh {{path/to/images}}`
-
-- View images recursively:
-
-`feh --recursive {{path/to/images}}`
-
-- View images without window borders:
-
-`feh --borderless {{path/to/images}}`
-
-- Exit after the last image:
-
-`feh --cycle-once {{path/to/images}}`
-
-- Set the slideshow cycle delay:
-
-`feh --slideshow-delay {{seconds}} {{path/to/images}}`
-
-- Set your wallpaper (centered, filled, maximized, scaled or tiled):
-
-`feh --bg-{{center|fill|max|scale|tile}} {{path/to/image}}`

pages/osx/hostname.md

@@ -1,12 +0,0 @@
-# hostname
-
-> Show or set the system's host name.
-> More information: <https://www.tutorialspoint.com/unix_commands/hostname.htm>.
-
-- Show current host name:
-
-`hostname`
-
-- Set current host name:
-
-`hostname {{new_hostname}}`