Linux Commands

fix-nautilus.sh

# Find the process IDs
ps awx | grep nautilus

# Then kill it
sudo kill -TERM <id>

linux-commands.sh

#locate
locate -i *red*house**city*

# top 30 largest files
du -sb * | sort -nr | head -30

# directory count
ls -l | grep ^d | wc -l

# directory count (recursively)
ls -lR | grep ^d | wc -l

# directory size
du -ch | grep total

# empty trash
rm -rf ~/.local/share/Trash/*

# check free disk space
df -h

# Search the specific word in directory and show filenames
grep -H -R 'eval(' . | cut -d: -f1

# Find suspicious PHP files
find . -type f -name "*.php" -exec grep --with-filename "eval(\|exec(\|base64_decode(" {} \;
./virus.php: eval(base64_decode($_GET['a']));

# Find files
find . -print | grep -i '*.php'

# Search for files containing a word in directory
grep -r word *

# Seach for a file containing a word excluding a directory
grep -r query  --exclude-dir=vendor

# Kill process running on port 9001
sudo kill `sudo lsof -t -i:9001`
sudo kill -9 $(sudo lsof -t -i:9001)
fuser -k 9001/tcp

pdf-utils.sh

# will work for PDF of any number of pages
pdftk in.pdf cat end-1 output out.pdf

run-in-background.sh

nohup java -jar /web/server.jar &

# The & symbol, switches the program to run in the background.

# The nohup utility makes the command passed as an argument run in the background even after you log out.

terminal-show-git-branch.sh

# Show git branch name
force_color_prompt=yes
color_prompt=yes
parse_git_branch() {
 git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
if [ "$color_prompt" = yes ]; then
 PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\]$(parse_git_branch)\[\033[00m\]\$ '
else
 PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w$(parse_git_branch)\$ '
fi
unset color_prompt force_color_prompt

tooling.sh

# Change Default Text Editor
sudo update-alternatives --config editor

ubuntu-locate-app.sh

# locate java installation dir
$ readlink -f $(which java)

## using symoblic links
# step 1
$ whereis java
java: /usr/bin/java /etc/java /usr/share/java

# step 2
$ ls -l /usr/bin/java
lrwxrwxrwx 1 root root 22 2009-01-15 18:34 /usr/bin/java -> /etc/alternatives/java

# step 3
$ ls -l /etc/alternatives/java
lrwxrwxrwx 1 root root 31 2009-01-15 18:34 /etc/alternatives/java -> /usr/local/jre1.6.0_07/bin/java

update-nodejs.sh

# install n
sudo npm install -g n

# then
sudo n latest

# or 
sudo n current

# or
sudo n lts