Case studies

• How to find if the directory/folder exist in a specific directory using linux commands.

         Tried: 

         [datastoreg@lgpbd1070(IPC2-Gold-EDGE) /idn/home/dlyelgg] $ ls -ltr *srik*

         o/p: 

         total 2

         -rw-r--r-- 1 dlyelgg dlyelgm7 202 Nov 15 10:40 1

         drwxr-xr-x 2 dlyelgg dlyelgm7   6 Dec  6 10:21 Shell_Scripting

         drwxr-xr-x 2 dlyelgg dlyelgm7   2 Dec  8 09:59 Python_Scripting

          

Unix commands that could be used in Putty

5/8/2016

Below are commands based of my knowledge:

• cd ..
• Will go to parent director
• cd /folder1
• Make you get to the child folder1
• ls
• Will list the files available in the current directory
• ls -ltr   --- will list down only file names (working)
• ll  ------ will list down file names and respective exact size.(working)
• head
• chops the first 10000 lines in the post.xml file and put it in posts_small.xm
• head -n 10000 post.xml > posts_small.xml   ---- working
• head -1000f <file name> ----- will list the first 1000 lines in same putty window.  ---- working
• tail
• chops the last 10000 lines in the post.xml file and put it in posts_small.xm
• tail -n 10000 post.xml > posts_small.xml   ---- working
• tail -1000f <file name> ----- will list the last 1000 lines in same putty window.  ---- working
•  ls -lah   ----- working
• This will give(o/p):
•  4 Feb 27 11:46 <file name>
• The command  is similar to ll but ll will give exact size of the file.
• ssh
• I generally use this to connect to server
• ssh <servername>  ---- this will help to login to specific server (working)
• wc -l <file_name>    --- this will give the number of records in a mentioned file (working)
• less?
• scp
• scp <complete source path of file>  <complete destination path of file>  ------ working
• The above command will copy the file in source path to the destination.  
• grep --  search a file for a pattern
• or you can filter the output for keywords (e.g. "apples") an then redirect to a file:
• ./script1.sh | grep apples > ./only-apples
• grep -r -e 'text1'  -e 'text2' <file name -string>* > output_file_name   ---- working
• Here the output_file_name will have all records that has text1 or text2  in file_name file
• By adding additional -e <string1>  ----- we could add more strings for for search.
• 
  

• To get Information related to command:
• Type: info <command_name> ----- this will give information of the command. Little bit of syntax too.
• Ex: info ls ----- is giving what ls means, what is the output of the command...working
• How to get syntax of the command?
• man <command_name>  ---- this will give syntax details
• List of commands that can be used with 'ls' 

          http://www.computerhope.com/unix/uls.htm

• 10/13/2016:
• Give execute permission to your script??
• chmod +x /path/to/yourscript.sh
• Once you are in the correct current folder you can run the script like this:
• sh ./script1.sh
• or you can run and redirect the output to a file:
• sh ./script1.sh > out.txt
• To run shell file:
• sh <name of file>.sh
• ./filename.sh
• . filename.sh

Below information to know list of commands available in Unix:(that could be used in Putty)

Source: http://mally.stanford.edu/~sr/computing/basic-unix.html

Unix commands

Note that there are thousands of commands available on a typical unix box. In bash, just hit the "Tab" key twice and say yes, to display the the commands currently available on your machine. A standard unix operating system lists currently thousands of commands. Type x to list all commands starting with x. The following list contains some of the more frequently used programs.

Access Control exit - terminate a shell (see "man sh" or "man csh") logout - sign off; end session (C shell and bash shell only;) passwd - change login password rlogin - log in remotely to another UNIX system ssh - secure shell slogin - secure version of rlogin yppasswd - change login password in yellow pages Communications mail - send and receive mail mesg - permit or deny terminal messages and talk requests pine - send and receive mail talk - talk to another logged-in user write - write to another logged-in user Programming Tools as - assembler, specific to each machine architecture awk - pattern scanning and processing language bc - online calculator cc - C compiler csh - C shell command interpreter dbx - source-level debugging program f77 - Fortran compiler gdb - GNU Project debugger gprof - display profile of called routines kill - kill a process ld - the UNIX loader lex - generate lexical analysis programs lint - check C source code make - maintain large programs maple - symbolic mathematics program math - symbolic mathematics program nice - run a command at low priority (see "man nice" or "man csh") nohup - run a command immune to hangups pc - Pascal compiler (xlp on ADS) perl - Popular script interpreter prof - display profile data python - Python programming language sh - Bourne shell command interpreter yacc - generate input parsing programs xcalc - graphical calulator under x Documentation apropos - locate commands by keyword lookup find - locate file (i.e. find . -name *.tex -print) info - start the info explorer program man - find manual information about commands whatis - describe what a command is whereis - locate source, binary, or man page for a program Editors emacs - screen-oriented text editor pico - screen-oriented text editor (renamed called nano) sed - stream-oriented text editor vi - full-screen text editor vim - full-screen text editor ("vi-improved") File and Directory Management cd - change working directory chmod - change the protection of a file or directory chown - change owner (or group) of a file or directory chgrp - change group of a file or directory cmp - compare two files comm - select/reject lines common to two sorted files cp - copy files crypt - encrypt/decrypt files (CCWF only) diff - compare the contents of two ASCII files file - determine file type grep - search a file for a pattern gzip - compress or expand files ln - make a link to a file ls - list the contents of a directory lsof - list of open files mkdir - create a directory mv - move or rename files and directories pwd - show the full pathname of your working directory quota - display disk usage and limits rm - delete (remove) files rmdir - delete (remove) directories stat - status of file (i.e. last access) sync - flush filesystem buffers sort - sort or merge files tar - create or extract archives tee - copy input to standard output and other files tr - translate characters umask - change default file protections uncompress - restore compressed file uniq - report (or delete) repeated lines in a file wc - count lines, words, and characters in a file File Display and Printing cat - show the contents of a file; catenate files fold - fold long lines to fit output device head - show first few lines of a file lpq - examine the printer spooling queue lpr - print a file lprm - remove jobs from the printer spooling queue more - display a file, one screen at a time less - like more with more features page - like "more", but prints screens top to bottom pr - paginate a file for printing tail - show the last part of a file zcat - display a compressed file xv - show print, manipulate images gv - show ps and pdf files xpdf = shopw pdf files (use gv) File Transfer ftp - transfer files between network hosts rsync - fast and flexible sync between computers scp - secure version of rcp

Miscellaneous alias - define synonym commands chquota - change disk quota on ACITS UNIX systems chsh - change default login shell clear - clear terminal screen echo - echo arguments pbm - portable bitmap manipulation programs popd - pop the directory stack (C shell only) pushd - push directory on stack (C shell only) script - make typescript of terminal session setenv - set an environment variable (C shell only) stty - set terminal options News/Networks netstat - show network status rsh - run shell or command on another UNIX system ssh - secure-shell version of rsh Process Control bg - put suspended process into background fg - bring process into foreground jobs - list processes ^y - suspend process at next input request ^z - suspend current process Status Information clock - determine processor time date - show date and time df - summarize free disk space du - summarize disk space used env - display environment finger - look up user information history - list previously issued commands last - indicate last login of users lpq - examine spool queue manpath - show search path for man pages printenv - print out environment ps - show process status pwd - print full pathname of working directory set - set shell variables (C shell, bash, or ksh) spend - lists year-to-date ACITS UNIX charges stty - set terminal options time - timing programs top - list top cpu processes uptime - show system load, how long system has been up w - show who is on system, what command each job is executing who - show who is logged onto the system whois - Internet user name directory service whoami - who owns the shell Image Processing gimp - photoshop type image processing program xfig - drawing program xv - image viewer xvscan - scan picture xpaint - paint program kpaint - kde paint program Sound mplayer - mpg player realplay - realaudio player timidity - midi to wav converter and player xmms - mp3 player Text Processing abiword - open source word processor addbib - create or extend bibliographic database col - filter reverse line feeds diction - identify wordy sentences diffmk - mark differences between files dvips - convert TeX DVI files into PostScript explain - explain phrases found by diction program grap - pic preprocessor for drawing graphs hyphen - find hyphenated words ispell - check spelling interactively latex - format text in LaTeX (based on TeX) pdfelatex - latex with pdf output latex2html - Latex to html lookbib - find bibliography references macref - make cross-reference listing of nroff/troff macro files ndx - create a subject-page index for a document neqn - format mathematics with nroff nroff - format text for simple display pic - make simple pictures for troff input psdit - filter troff output for Apple LaserWriter ptx - make permuted index (not on CCWF) refer - insert references from bibliographic databases roffbib - run off bibliographic database sortbib - sort bibliographic database spell - find spelling errors ispell - interactive spell checker style - analyze surface characteristics of a document tbl - format tables for nroff/troff tex - format text tpic - convert pic source files into TeX commands wget - grab webpage X windows grabmode - info on screen: i.e. "1152x864" 51.213kHz/56.59Hz import - grab window (i.e. import ppm:- >out.ppm) xdpyinfo - number of colors xkill - kill xwindow xlock - lock screen xterm - xterminal xwininfo - information on open window Web html2ps - html to ps latex2html - latex to html translator lynx - text based webbrowser netscape - webbrowser sitecopy - sitecopy is for easily maintaining remote web sites. weblint - html sytax and style checker