Mr Ajay Kumar Tiwari - Linux Hacker

Linux Hack Ajay Kumar Tiwari Table of Contents Introduction Foreword Version Chapter 1: Powerful CD Command Hacks Use CDPATH to define the base directory for cd command Use cd alias to navigate up the directory effectively Perform mkdir and cd using a single command Use cd - to toggle between the last two directories Use dirs, pushd and popd to manipulate directory stack Use shopt -s cdspell to automatically correct mistyped directory names on cd Chapter 2: Date Manipulation Set System Date and Time Set Hardware Date and Time Display Current Date and Time in a Specific Format Display Past Date and Time Display Future Date and Time Chapter 3: SSH Client Commands Identify SSH Client Version Login to Remote Host using SSH Debug SSH Client Session Toggle SSH Session using SSH Escape Character SSH Session Statistics using SSH Escape Character Chapter 4: Essential Linux Commands Grep Command

Linux Hack Ajay Kumar Tiwari Find Command Suppress Standard Output and Error Message Join Command Change the Case Xargs Command Sort Command Uniq Command Cut Command Stat Command Diff Command Display total connect time of users Chapter 5: PS1, PS2, PS3, PS4 and PROMPT_COMMAND PS1 - Default Interaction Prompt PS2 - Continuation Interactive Prompt PS3 - Prompt used by select inside shell script PS4 - Used by set -x to prefix tracing output PROMPT_COMMAND Chapter 6: Colorful and Functional Shell Prompt Using PS1 Display username, hostname and basename of directory in the prompt Display current time in the prompt Display output of any command in the prompt Change foreground color of the prompt Change background color of the prompt Display multiple colors in the prompt Change the prompt color using tput Create your own prompt using the available codes for PS1 variable Use bash shell function inside PS1 variable Use shell script inside PS1 variable Chapter 7: Archive and Compression

Linux Hack Ajay Kumar Tiwari Zip command basics Advanced compression using zip command. Password Protection of Zip files Validate a zip archive Tar Command Basics Combine gzip, bzip2 with tar Chapter 8: Command Line History Display TIMESTAMP in history using HISTTIMEFORMAT Search the history using Control+R Repeat previous command quickly using 4 different methods Execute a specific command from history Execute previous command that starts with a specific word Control the total number of lines in the history using HISTSIZE Change the history file name using HISTFILE Eliminate the continuous repeated entry from history using HISTCONTROL Erase duplicates across the whole history using HISTCONTROL Force history not to remember a particular command using HISTCONTROL Clear all the previous history using option -c Substitute words from history commands Substitute a specific argument for a specific command Disable the usage of history using HISTSIZE Ignore specific commands from the history using HISTIGNORE Chapter 9: System Administration Tasks Partition using fdisk Format a partition using mke2fsk Mount the partition