Revision as of 09:46, 22 May 2020

How To Something

NeXT Steps

 here everything has yet to be done !

coming soon :

Everything You Always Wanted to Know on git [seldom]... (But Were Afraid to Ask) a collection of links of interest

See also

• Main_Page
• Technoverse
• git

guides

Unix Shell

• working with file and directories
  • https://swcarpentry.github.io/shell-novice/03-create/index.html
• Shell
  • https://swcarpentry.github.io/shell-novice/06-script/index.html
• how to find things
  • https://swcarpentry.github.io/shell-novice/07-find/index.html

useful commands

cd

cp

df

ls

ls
ls -al
ls -alf

ln

mv

mkdir

rm

touch

Find

grep

awk

sed

cat

less

vi

vim

ssh

scp

How To

How To

using grep

grep -rwl '/path/' -e "string"
grep -rwl '/path/' -e "string" | grep 'path_string'

combining find and command using exec

• tous les dossiers appelés target

find -name target -type d

• effacer tous les dossier nommé "target" executer un rm recursif, le dossier target est utilisé part maven entres autres

find -name target -type d -exec rm -r {} \;

• chercher une chaine searched_string_in_file dans les fichers *.cxx

find . -type f -name "*.cxx" -exec grep "searched_string_in_file" {} \;

• ajouter -print pour afficher le fichier conteneur

find . -type f -name "*.cxx" -exec grep "searched_string_in_file" {} \; -print 

• filtrer le chemin d'access et afficher le fichier

find /path -path '*path_string*' -type f -exec grep -qw 'string' {} \; -print

Activate core dumps

• https://www.akadia.com/services/ora_enable_core.html
• https://linux-audit.com/understand-and-configure-core-dumps-work-on-linux/
• https://linuxhint.com/linux_ulimit_command/
• https://superuser.com/questions/1200539/cannot-increase-open-file-limit-past-4096-ubuntu

• activate for all users

ulimit -a

• then set for a user

ulimit -c unlimited

• system config files

/etc/security/limits.conf

• Ubuntu

Apport is managing core dump (16.04)

sudo systemctl enable apport.service 
sudo service apport start.

/etc/apport/crashdb.conf

cat /proc/sys/kernel/core_pattern
 |/usr/share/apport/apport %p %s %c %d %P %E

location:

/var/crash/