• :%!column -t : Pour aligner tous le contenue avec vim
• !column -t : Dans le cas ou vous voulez aligner uniquement une selection

Source : http://stackoverflow.com/questions/1229900/reformat-in-vim-for-a-nice-column-layout

Commandes de base Systemd

Voici une liste des commandes de base pour gérer vos daemons via systemd

J’ai mis sshd comme exemples de daemon sur lequel s’applique les exemples.

Compression

tar

Decompression

Substitution basique

Simple

• 1ère occurrence (de chaque ligne) rencontrée uniquement

sed 's/la/LA/' fichier.txt

Globale

• Toutes les occurrences (de chaque ligne) rencontrées

sed 's/la/LA/g' fichier.txt

Ciblée

• Seulement la 2ème occurrence (de chaque ligne) rencontrée

sed 's/la/LA/2' fichier.txt

Substitution conditionnée

Simple

/Motif/ - Uniquement si la ligne contient " motif "

sed '/awk/ s/sed/SED/' fichier.txt

Numéro de ligne - Uniquement la ligne n° " N "

sed '18 s/sed/SED/' fichier.txt

/Regex/ - Uniquement s’il y a correspondance avec l’expression régulière

man rtfm

NAME

   rtfm - a response for easy questions from clueless lusers

SYNOPSIS

   rtfm [ -p ] [ -h ] [ -d option ] [ -i interval ] [ -a action ] [ -q
   luser]

DESCRIPTION

   rtfm is a command for system administrators to use in dealing with new
   users. rtfm is useful for dealing with users having trouble with their
   pictures downloaded from alt.binaries.pictures.erotica. rtfm will
   continue to run until killed by hand, using `kill processid'. rtfm can
   be invoked by anyone who has enough of a clue to know what a man page
   is.

OPTIONS

   -p
          Give the answer in a polite fashion.
   -h
          Tell the clueless luser to go to hell. Used with the -p option,
          they'll look forward to the trip.
   -d option
          Debug mode using option where option is one of the following:
          query Ask the luser what part of rtfm that he or she does not
          understand.
          planet Ask what planet the luser is from.
          literacy Ask the luser if the luser can read.
          english Ask the luser if the luser understands English.
          Mac Ask the luser if the luser has ever used a computer other
          than a Macintosh.
          Nintendo Same as the Mac option, but slightly more harsh.
   -i interval
          Enable within interval seconds. interval is the time between a
          luser asking the same damn fool question. This option must be
          activated for the -a option. It stores the time of the question
          in /var/run/luser and checks that file each time that rtfm is
          activated. interval is a number of minutes, of the form xxx.xx
          where each x is a decimal digit. The default is 5.00 minutes.
   -a action
          This defines some action to be taken in the event that the -i
          flag condition is met. action can be defined either at the flag
          level or by a file. The options for flags are as follows:
          scream Let out a scream of utter frustration.
          hair Rip out your hair in total frustration.
          rm Automatic command ran in lusers home directory. It can have
          an addition -rf flag added.
          ignore Ignore the luser.
          warn Warn the other sysadmins.
          forward Forward to CNS advising. Particularly if the complaint
          is /dev/null is full.
          kill Kill all the lusers processes.
          FILE=file.name Use a file to define a course of actions. This
          can be any executable file except those using ksh, which no
          god-fearing right-thinking sysadmin would be caught using lest
          he be struck down by the wrath of God.
   -q luser
          Query file /etc/luser to see if luser is a real luser or a
          first time luser.

FILES

   /etc/luser

SEE ALSO

   mr.biff(2),

BUGS

   rtfm only checks /var/run/luser when the -a option is specified and
   after the -i option is invoked. Otherwise /tmp would fill up rapidly
   on many systems. Also, core may dump if the -a FILE= option is
   anatomically impossible.```

Source : http://support.apple.com/kb/HT1533?viewlocale=fr_FR

OpenSSH depuis la version 4.2 permet de multiplexer plusieurs connections en une.

Il faut ajouter dans la configuration de votre client ssh (~/.ssh/config) :

Host *
 ControlMaster auto
 ControlPath ~/.ssh/sockets/%r-%h-%p

Toutes les nouvelles connections vers un hôte ou vous êtes déjà connectés passeront à travers cette connexion.

Ce qui en plus d’accélérer le temps de connection, apporte l’avantage de ne plus demander de mot de passe.

Les droits sur le dossier " sockets " doivent être 0600, uniquement, toutes les personnes ayant accès aux socket pourront utiliser les connexions actives.

Obtenir des informations

Gestion des paquets

• Lancez un invité de commande (console “DOS”).
• Placez vous dans le dossier à lister.
• Entrez

dir /a /o:gen > liste.txt

• Pour ouvrir rapidement le fichier, entrez

notepad liste.txt

Et voila, rien de plus simple