Q. Why I am getting the error Command not found? How do I fix this problem?
A. A common question asked by new Linux or UNIX users. When you get the error "Command not found" it means that Linux or UNIX searched for command everywhere it knew to look and could not find a program by that name. Another cause is you misspelled the command name (typo) or administrator does not at all install the command on your Linux/UNIX system. To get rid of this error:
1) Make sure command was not misspelled:
All Linux and UNIX commands are case sensitive and you type correct spelling of command.
2) Make sure command is your path
You can see current search path with following command:
$ echo $PATH
/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11R6/bin:/usr/local/bin:/home/vivekgite/bin
Usually all user commands are in /bin and /usr/bin or /usr/local/bin directories. All your programs are installed in these directories. When you type clear command, you are running /usr/bin/clear. So if it is not in path try to add directories to your search path as follows (setup Linux or UNIX search path with following bash export command):
$ export PATH=$PATH:/bin:/usr/local/bin
You can also find out of path of any command with which or whereis commands:
$ which ls
/bin/ls
$ which gcc
/usr/bin/gcc
$ which date
/bin/date
$ which cal
/usr/bin/cal
$ whereis gcc
/usr/bin/gcc
Remember you can run a program using its full pathname:
$ /bin/ls $ /bin/date
Finally, sometime you may not have permission to run the command.
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{ 35 comments… read them below or add one }
Hi,I have a problem when I run the command under Cygwin.
I type
./run.bash
However,it shows:
:command not found
‘/run.bash: line 6: Syntax error near unexpected token ‘
‘/run.bash: line 6: ‘function gplot’
All this code was definitely right, that’s our teacher who give to us..
So what’s the problem?
Thank you
Line 6 has an error. Can you just copy and paste your source code here. Put in
<code>your script code…</code>
tags, so that I can help you further.
the command ‘setup’ is not working, it says command not found although there is a man page for that command…can u help me how to make it work or is there any alternate command for the above??
Hi
I have a bash script say “simulate”.
When i type simulate on cmd prompt, it says
command not found. but when i type
./simulate it works.
What can be reason. i checked PATH, /bin is there.
Which bash says /bin/bash.
regards
Sandeep
Sandeep,
Add your home directory to PATH
export PATH=$PATH:/home/you
Thank you so much!
I was having this same problem.
Hi configure command is not there in my bin folder. So this command is not executing. Pls help me that what i have to do to run this command?
If the $PATH variable is correct a fully qualified path works, try typing “rehash” at the command prompt to update the systems list of valid commands.
the man command is not working
it gives comand not found error.
i get an error as ‘Command not found’ when i use zgrep. can any one help me on this. any command to grep through zip files(i need the filename as output)
hi guys!
i’m new to ns2..could someone please tell me why i keep having “command not found” error messages as follows. What should i doooo??? HELP
zaid@ymax-hw-0006:~/Desktop/ns-allinone-2.32/ns-2.32$ testing.tcl
/home/zaid/Desktop/ns-allinone-2.32/ns-2.32/testing.tcl: line 4: namtrace-all: command not found
/home/zaid/Desktop/ns-allinone-2.32/ns-2.32/testing.tcl: line 6: proc: command not found
/home/zaid/Desktop/ns-allinone-2.32/ns-2.32/testing.tcl: line 7: global: command not found
/home/zaid/Desktop/ns-allinone-2.32/ns-2.32/testing.tcl: line 8: flush-trace: command not found
/home/zaid/Desktop/ns-allinone-2.32/ns-2.32/testing.tcl: line 9: close: command not found
zaid@ymax-hw-0006:~/Desktop/ns-allinone-2.32/ns-2.32$ Cannot connect to existing nam instance. Starting a new one…
nam: Unable to open the file “out.nam.nam”
Help me
I have a samba server configuration , and when I will start it, it show me this post of error
/bin/bash: smbd: command not found
And I don´t know what i have to do for fix it
hi
when i used the echo command
its showing command not found
and i dnt know how to fix
plz help me
my Linux Fedora 6 was hacked by some one who change the rights of root and give himself all right
now i can enter with root but when i want to execute command always get this message ‘commang not found’
what can i do to take back my root right please?
This is very very easy and useful. *** V V Good ***
Hi,
I want to execute sas program through unix script.
I tried to execute simple program through script.below is the script:
#/bin/ksh
cd //SASDATA/cz/cp151/Macros
sas a.sas
However, I could not execute it.I get following message:
sh test.sh
test.sh: sas: not found
Please guide me .
Dear friendz,
When i open terminal in ubuntu linx,it showing me::::; desktop:command not found
I have installed successfull the ns2 .Tclscripts can’t be compiled,morover,uptil now(because i have just tried very simple & small programes) “puts” command is not working.It is saying- command not found.I have installed cygwin in g drive.I am opening the prompt from desktop shortkut & entering the directory by-
$ cd c:
$ cd cygwin
$ set a “5″
$ puts a
bash: puts: command not found
also i was trying to find whereis “puts command” i found the location but i dont know how to handle the problem .
puts: usr/share/man/man3/puts.3.gz
Thanks in advance……….
Hi Vivek,
I want to know the path for command “export”, command “set”
when I am doing
[root@test usr]# /usr/bin/which export
/usr/bin/which: no export in (/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin)
can you please help me on this?
Cheers,
Sameer
Hi,
I ran into a “make: arm_v5t_le-gcc: command not found” with “make” facility while I was doing compile a program.
I ran this compiling with arm_v5t_le-gcc full path, I got the same error.
I checked the $PATH, and the the arm_v5t_le-gcc is in there.
I checked with “locate”, and the arm_v5t_le-gcc is there.
I checked with “which”, and the arm_v5t_le-gcc is there.
I checked the permission, and the arm_v5t_le-gcc is 755.
What else may cause this “command not found” error? Any guys can help me?
Thank you very much!
Cheer,
Justin
which is in Base and Utils but whereis I can’t find in Cygwin
thx mate,
I had terrible bugs because I named a variable PATH
find … | while read
PATH=subtr.
thanks
export PATH……………
worked
it worked! thanks! very useful
hey there I am using backtrack4 in windows 7 my graphics card is atı hd 5650
when ı command this :
airodump-ng -w captura -c 11 — bssid 00:3e:d7:65:e2:87 wlan0
I GET ALLWAYS SAME ERROR
bash: 3e: command not found
note :I can see all of wifi/wlan etc.
do you happen to know where to look for that specific message “command not found” in centos? I’d like to chnage it to something else but am not able to locate it anywhere… have found it in other distros like ubuntu/debian – they have it in /etc/bash.bashrc and they even have such package by name command-not-found… and I was able to replace it with desired content… so, is there a way to perform the same on centos?
oldmodes is the users: command not found
I am using cygwin and when i compile program hello.cc
by command gcc hello.cc -o hello
it shows installation problem,cannot exec ‘cc’plus’:No such file or directory
but when i execute program with command ./hello.exe
it shows output
how should i remove this problem plz tell me.
Hi . I am using Red hat E 4 and i am working bops simulator.
after compile makefile , bops exe is producted and existed.
but by input command :bops test
Error is : bops :not command found.
thanks.
hi, I have installed ns2 simulator in fedora5.The installation happened perfectly,
but when i start opening ns,I am geeting error as command not found
$ns
$nam
error :command not found
please help me if i need to set any variables
i dont get vi editor screen.whan i type “vi file name” i get the answer as command not found.i will be in /bin/bash. how did i over this problem.
Thank you so much!!
while using proc command in cygwin its displaying
bash:proc -command not found
can you please help me on this?
Hi,
I just found this thread through Google.
My situation was similar, but the resolution was simple and different. It wasn’t related to the code at all.
I was on my Windows 7 machine connecting to my UNIX server through Notepad++ using the FTP plugin.
I was getting the same error mentioned here –
} ./test_script.sh
./test_script.sh: Command not found.
After looking at the initial things I was like “Doh!” and I checked the Notepad++ -> Edit Menu -> EOL Converstion settings and of course it was set to Windows and not UNIX.
After I set it to UNIX and uploaded the latest copy, the program executed without problems.
Just thought I’d note that here in case people have the same issue.
Peace,
Justin
hi, I have installed ns2 simulator in fedora5.The installation happened perfectly,
but when i start opening ns,I am geeting error as command not found
$ns
$nam
error :command not found
please help me if i need to set any variables