Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

(singke) #1
one-until-success   in  the man page.

run-this-one—Operates   exactly like    run-one except  that    it  uses
pgrep and kill to find and kill any running processes owned by the
user and matching the target commands and arguments. It blocks while
trying to kill matching processes until all matching processes are dead.
keep-one-running—Operates exactly like run-one except that it
respawns “COMMAND [ARGS]” any time COMMAND exits (zero or
nonzero).
ssh-import-id—Uses a secure connection to contact a public key server
(https://launchpad.net by default) to retrieve one or more users’ public
keys and append them to the current user’s
~/.ssh/authorized_keys file.

bootmail—Called by  cron    to  send    an  email   any time    a   system  is
rebooted. It reads a list of one or more comma-separated email addresses
from /etc/bootmail/recipients and then loops over a list of
white space-separated files in /etc/bootmail/logs to construct the
email. This is useful for know when remote systems are rebooted.
purge-old-kernels—Looks for old kernels on your system and removes
them. This is a part of the Byobu package.
col1—Splits and prints a given column, where the column to print is the
name of the script program you are running (col1 to col9). col2 to
col9 are symlinks to col1; their behavior simply changes based on the
name called. For example, instead of using awk ‘{print $5}’, you
can use col5. This used to be in Bikeshed but is now part of the Byobu
package.
wifi-status—Monitors a wireless interface for connection and associated
information. This used to be in Bikeshed but is now part of the Byobu
package.

References


http://subversion.apache.org—The    main    website for Subversion
http://bazaar.canonical.com/en/—The main website for Bazaar
http://www.mercurial-scm.org—The main website for Mercurial
http://git-scm.com—The main website for Git
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