Unix commands(p-z)

Unix Commands from p to z: passwd: Allows changing your login password ps : Lists all of current user's live processes ps -ef : List all users processes that are executing pwd: Displays current working directory you are in rcp filename1 hostb:/usr/local/bin : Copies filename1 from current host system to hostb, and places it in the /usr/local/bin directory; The .rhosts or hosts.equiv files must be setup to allow action rksh: Starts restricted Korn Shell session rlogin hostb : Logs into remote host name hostb rm filename1 : Deletes filename1 from the disk without recourse rm -i filename1 : Deletes filename1 after prompting for verification rmdir dirx : Deletes directory dirx rmdir -r dirx: Deletes directory and all contents rsh: Restricted version of Bourne Shell for security sar : System Activity Reporter sh : Bourne Shell command interpreter; Alternative to Korn Shell and C shell but is the default on most systems; Older version that is losing popularity sleep 3 : Pauses for 3 seconds and continues stty sane: Attempts to restore terminal settings after they are hosed; Use CTRL-J with this command stty erase ^H : Use to reset backspace/delete; ^H is the key you may want to use for backspace/delete; su sam: Log on as user sam su - sam: Log on as sam, and execute his profile too tail filename1 : Display last few lines of filename1 tail -50 filename1 : Display last fifty lines of filename1 tail -f : Continually reads updating file; Great for monitoring a log file while being written tar -cvf /dev/rmt/0c /usr/bin/* : Tape archive utility; Copies all files in /usr/bin directory to tape device /dev/rmt/ tar -xvf /dev/rmt/0 /usr/bin/ : Extracts all files from tape device /dev/rmt/0 and writes them to /usr/bin/ tar -tvf /dev/rmt/0c : Read tape on device /dev/rmt/0c and lists contents in verbose mode tee: Used in scripts to split output to two outputs. Usually used with a pipe command (|) tee -a /tmp/filename1: Append the output to filename1 without overwriting its original content telnet hostb: Create a remote terminal on hostb touch filename1 : Creates an empty file named filename1; Changes modification time to current time if the file already exists uname -a: Lists 0/S revision, host name, hardware uncompress filename1 : Uncompresses file with .Zsuffix, created by compress command previously uptime : Displays current time, time logged-in,number of users etc users: Displays current logged-in users in a listing uucp : UNIX-to-UNIX copy utility; See man pages view filename1: A read only version of vi editor w : Combination of uptime, who and ps -a commands wall : Write to all; Allows entry of message to be sent to line 25 of all terminals; End message with a CTRLD command wc -l filename1: Utility that counts the number of lines in filename1 wc -c filename1 : Utility that counts the number of bytes in filename1; -m provides number of characters wc -w filename1 : Utility that counts the number of the words in filename1 whence filename2: Prints path name location of executable filename2 which filename2 : Similar to whence command who – Displays login name, terminal name, date, and time of login, of users currently logged in who am i : Displays effective user id of user who -b : Displays date/time of last reboot who -r : Displays current system run level