Disk Erişim Hızını İyileştirme:
Dikteki dosyaların her okunduğunda bir de okundu bilgisinin yazılmaması için noatime kullanılır(nodiratime da içerir). Journal 'i kapatmak için data=writeback, kullanılır.
/etc/fstab >>
UUID=7f5392f8-939b-4149-9f04-8b377ad0cdb4 / ext4 defaults,noatime,data=writeback,errors=remount-ro 0 1
# /tmp dizinini RAM'e bağlama
tmpfs /tmp tmpfs defaults,noatime,nosuid,nodev,noexec,mode=1777,size=512M 0 0
Bellek İyileştirmeleri:
/etc/sysctl.conf >>
#Swap kullanim oranini azaltir
vm.swappiness=10
# Inode kullanan sistem nesnelerinin daha uzun sure cache de kalmarini saglar
vm.vfs_cache_pressure=50
TTY Sayısını 3 e İndirmek:
/etc/default/console-setup >>
ACTIVE_CONSOLES=”/dev/tty[1-3]
sudo rm /etc/init/tty6.conf /etc/init/tty5.conf /etc/init/tty4.conf
Preload İle Sık Kullanılan Programları Önyüklemek:
sudo apt-get install preload
Hybernate Ve Sleep i kinit 'de başlatılmasını engellemek:
# Başına # koyarak yorum satırı haline getir:
# RESUME=UUID=427075a3-381d-466b-a8d4-d08e8d183b6c
#!/bin/bash
echo -ne '##### (33%)\r'
sleep 1
echo -ne '############# (66%)\r'
sleep 1
echo -ne '####################### (100%)\r'
echo -ne '\n'
Açıklama :
\r : Satırın başına gitmeye yarıyor
-n : '\n' yi yazdırma
-e : '\r' gibi ifadeleri yakalamak için
Sudo Without Password :
ozgur ALL=(ALL) NOPASSWD: ALLGPG Key ekleme:
sudo apt-key adv --keyserver keys.gnupg.net --recv-keys A040830F7FAC5991Shell üzerinden daemon disable etme:
update-rc.d apache2 disableGrub 2 çözünürlüğünü değiştirme :
sudo nano /etc/default/grub
>>
GRUB_GFXPAYLOAD_LINUX=1680x1050
GRUB_GFXMODE=1680x1050dosyayı kaydettikten sonra >>
echo FRAMEBUFFER=y | sudo tee /etc/initramfs-tools/conf.d/splash
sudo update-grub2
sudo update-initramfs -uSSH girişlerinde şifre sormaması için :
a@A:~> ssh-keygen -t rsa
a@A:~> ssh b@B mkdir -p .ssh
a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
Dosya isimlerindeki boşlukları _ ile değiştirmek için
for f in *\ *; do mv "$f" "${f// /_}"; done
Bir dizindeki dosyaların içinde bir kelime aramak için
grep -rl "KELİME" DİZİN_YOLU
Bul ve sil
find . -name *.pyc -exec rm -f {} \;
Update grub
grub-mkconfig -o /boot/grub/grub.cfg
Scan all network for device discovery
sudo arp-scan --interface=enp59s0 --localnet
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user .bashrc >>
# If not running interactively, don't do anything
[ -z "$PS1" ] && return
# don't put duplicate lines in the history. See bash(1) for more options
export HISTCONTROL=ignoredups
export EDITOR="nano"
# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize
# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(lesspipe)"
PS1='\[\e[1;37m\]\u\[\e[m\]\[\e[1;32m\]@\[\e[m\]\[\e[1;32m\]Linux:\A\[\e[m\]\[\e[1;35m\]\w\[\e[m\]\[\e[1;32m\]>> \[\e[m\]\[\e[1;37m\] '
# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"'
;;
*)
;;
esac
# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ]; then
. /etc/bash_completion
fi
#for eclipse
export MOZILLA_FIVE_HOME=/usr/lib/firefox-5.0/
export EDITOR=/usr/bin/nano
#forpython
export PYTHONDOCS=/usr/share/doc/python2/html/
# For colourful man pages (CLUG-Wiki style)
export LESS_TERMCAP_mb=$'\E[01;31m'
export LESS_TERMCAP_md=$'\E[01;31m'
export LESS_TERMCAP_me=$'\E[0m'
export LESS_TERMCAP_se=$'\E[0m'
export LESS_TERMCAP_so=$'\E[01;44;33m'
export LESS_TERMCAP_ue=$'\E[0m'
export LESS_TERMCAP_us=$'\E[01;32m'
# Colourful prompt
eval "`dircolors -b`"
export GREP_COLOR="1;33"
alias grep='grep --color=auto'
alias pac='sudo pacman-color'
alias pow='sudo powerpill'
alias la='ls -alh --color=auto'
alias ll='ls -lh --color=auto'
alias ls='ls -a --color=auto'
alias diff='colordiff'
alias cp='cp -rvf'
alias mv='mv -vf'
alias rm='rm -v'
Color prompt for root :
PS1='\[\e[0;31m\]\u\[\e[m\] \[\e[1;34m\]\w\[\e[m\] \[\e[0;31m\]\$ \[\e[m\]\[\e[0;32m\]'
Color prompt listesi :
txtblk='\e[0;30m' # Black - Regular
txtred='\e[0;31m' # Red
txtgrn='\e[0;32m' # Green
txtylw='\e[0;33m' # Yellow
txtblu='\e[0;34m' # Blue
txtpur='\e[0;35m' # Purple
txtcyn='\e[0;36m' # Cyan
txtwht='\e[0;37m' # White
bldblk='\e[1;30m' # Black - Bold
bldred='\e[1;31m' # Red
bldgrn='\e[1;32m' # Green
bldylw='\e[1;33m' # Yellow
bldblu='\e[1;34m' # Blue
bldpur='\e[1;35m' # Purple
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
unkblk='\e[4;30m' # Black - Underline
undred='\e[4;31m' # Red
undgrn='\e[4;32m' # Green
undylw='\e[4;33m' # Yellow
undblu='\e[4;34m' # Blue
undpur='\e[4;35m' # Purple
undcyn='\e[4;36m' # Cyan
undwht='\e[4;37m' # White
bakblk='\e[40m' # Black - Background
bakred='\e[41m' # Red
bakgrn='\e[42m' # Green
bakylw='\e[43m' # Yellow
bakblu='\e[44m' # Blue
bakpur='\e[45m' # Purple
bakcyn='\e[46m' # Cyan
bakwht='\e[47m' # White
txtrst='\e[0m' # Text Reset
Prompt Parametreleri:
* \a : an ASCII bell character (07)
* \d : the date in "Weekday Month Date" format (e.g., "Tue May 26")
* \D{format} : the format is passed to strftime(3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation. The braces are required
* \e : an ASCII escape character (033)
* \h : the hostname up to the first '.'
* \H : the hostname
* \j : the number of jobs currently managed by the shell
* \l : the basename of the shell’s terminal device name
* \n : newline
* \r : carriage return
* \s : the name of the shell, the basename of $0 (the portion following the final slash)
* \t : the current time in 24-hour HH:MM:SS format
* \T : the current time in 12-hour HH:MM:SS format
* \@ : the current time in 12-hour am/pm format
* \A : the current time in 24-hour HH:MM format
* \u : the username of the current user
* \v : the version of bash (e.g., 2.00)
* \V : the release of bash, version + patch level (e.g., 2.00.0)
* \w : the current working directory, with $HOME abbreviated with a tilde
* \W : the basename of the current working directory, with $HOME abbreviated with a tilde
* \! : the history number of this command
* \# : the command number of this command
* \$ : if the effective UID is 0, a #, otherwise a $
* \nnn : the character corresponding to the octal number nnn
* \\ : a backslash
* \[ : begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt
* \] : end a sequence of non-printing characters
başına source yerine . koyuyoruz. Böylece yeni bir kabuk açmak yerine aynı kabuk üzerinde işlem yapıyor
$ . ./setup.bash
Mkv ses dosyasını ac3 e dönüştürmek :
ffmpeg -i 'inputfile' -vcodec copy -scodec copy -acodec ac3 -ac 6 -ab 640k 'outputfile'
Mov dosyalarını Avi dosyasına dönüştürmek:
1) Direk Dönüşüm:
avconv -i in_movie.mov out_movie.avi
2)Bitrate i yükseltiyoruz:
avconv -i in_movie.mov -b 19000k -b:a 192k -out_movie.avi
3)Bitrate i koruyup çözünürlüğü azaltıyoruz ve bütün dizinin içini taratıyoruz:
#!/bin/sh
i=0
for file in /home/ozgur/Desktop/temp/test/*
do
#whatever you need with "$file"
echo " ====> Processing $i"
echo " ====> Processing $file"
avconv -i $file -b 19000k -b:a 192k -s 960x540 $file.avi
i=i+1
done
4) with ffmpeg
#!/bin/sh
i=0
for file in /home/ozgur/Desktop/temp/test/*
do
#whatever you need with "$file"
echo " ====> Processing $i"
echo " ====> Processing $file"
ffmpeg -i $file -vf scale=960:-2 -c:v libx264 -crf 20 -preset slow -c:a copy $file.mkv
i=i+1
done