Shells are used to interact with the OS and launch other applications. Most shells also have built-in commands such as directory listings and moving and copying files around the file system. Other shells, such as Bash (bash), can be heavily scripted to do a multitude of tasks.
1
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0answers
12 views
Looking for Primos “name generation” code
Anyone remember Primos ? It had a shell-level thing called "name generation" which was very useful. Eg. to rename a bunch of files from part1.suffix to part1.new.suffix2 you could say
rename *.suffix ...
0
votes
2answers
14 views
how to get bash prompt on login
When I connect to remote machine uisng ssh, by default it is not on bash prompt. To get bash prompt by default on login I did as below by create .cshrc file in my home directory
if ($?prompt) then
...
0
votes
1answer
42 views
How to zip multiple files into separate archives?
I admit this question was asked here before:
Like Zip into separate files where the person who asked didn't specify the OS he used and received no answers.
I need to separate a huge directory ...
2
votes
1answer
14 views
Can tar be forced to exit on the first error?
By default, for many kinds of errors tar prints a message to stderr and then continues on its way -- the errors it calls "recoverable" errors, typically errors that relate to a single file or archive ...
2
votes
1answer
21 views
Per directory shell customisation
Is it possible to source a shell file when entering a directory, and unsource it when I leave?
Ie certain project directories would be really useful to autoload some command aliases, but only in that ...
0
votes
2answers
52 views
Search for exe file within a condition
I want to search for all .exe files greater than 200 kB or smaller than 120 kB in the current folder and its subfolders. Then I want to move them to another folder called "folder" and execute in this ...
2
votes
1answer
25 views
bash completion does not work for newly added user
I added a new user in my ubuntu system with
sudo useradd -d /home/peeyush -m peeyush
sudo passwd peeyush
The above list of commands created a new user successfuly but the new user is unable to use ...
0
votes
1answer
24 views
UTF-16 file output in cmd.exe
chcp 10000
echo hell☺ w☻rld♥! >> "UTF-16 file☺☻♥♦♣♠"
OK, it creates correct file, but in the content there are question marks instead of unicode characters. How to fix it?
2
votes
1answer
54 views
Send all error messages to a text file?
I'm trying to run the following command:
$ psql -d template_postgis -f /usr/local/pgsql-9.1/share/contrib/postgis-2.0/postgis.sql
It produces a vast amount of error output, of which I can only ...
1
vote
0answers
27 views
tail -f updates slowly
I'm not sure why, but on my Macbook Pro running lion I get slow updates when I issue "tail -f" on a log file that is being written to. I used to use this command all the time at my last company but ...
3
votes
1answer
59 views
How can I do a recursive find and replace from the command line?
Using a shell like bash or zshell, how can I do a recursive 'find and replace'? In other words, I want to replace every occurrence of 'foo' with 'bar' in all files in this directory and its ...
3
votes
1answer
55 views
Read files inside directory and group them on new sub-directory (creating the subdir and renaming the file)
I've performed a recovery for old deleted files! The process was a complete success and recovered files from years ago.
Now the problem is going through all the 400000 files recovered of the type JPG ...
2
votes
2answers
78 views
What happens under the hood when I run a command line program in another programming language?
Some programming languages have system() exec() calls where I can run commands. What exactly happens when I do that? If I run system("ls") Does it run a bash interpreter on the string? Does it make an ...
0
votes
2answers
56 views
Redirect stdout to stderr in tcsh
From my understanding, the following should send 'test' on standard error in tcsh:
echo test >&2
However, it instead writes 'test' to a file named 2, and when I look through my history, I ...
4
votes
3answers
154 views
Mistakenly ran chmod 644 /usr/* Any way to recover my installation?
I ran chmod 644 /usr/* on my installation of Mac OSX 10.6.
Now, everything is not working, from chmod to every other command. Obviously those commands are in /usr/bin, and I do not have execute ...
2
votes
1answer
49 views
What is the shell mode started with the apostrophe?
In a (SSH) terminal session, what is the purpose of the mode started by the key sequence apostrophe <ENTER> or more literally '<ENTER>.
What is the way to exit that mode?
0
votes
1answer
43 views
Remove middle folder?
I have foo/bar/myfiles and I want foo/myfiles.
I was trying to git clone a repo into foo, but it made the name of the repo as a folder and put the files in there. I'm thinking of just cloning into ...
0
votes
0answers
56 views
How to recover a directory that was corrupted to a 32kb file?
I am trying to recover a 200 GB directory that was accidentally lost and "converted" to a 32kb file. It was on a FAT32, 500 GB external hard drive. Only this folder got corrupted, on a Windows ...
1
vote
2answers
66 views
Cron daemon running status check
I have a script which need to be run as cron job.
In the staging environment i could run the script as a cronjob. but in the production environment it is not working,
so i checked whether cron ...
0
votes
1answer
41 views
using emacs shell with gnu screen?
How can I use a bash shell in emacs (M-x shell) when I am trying to connect restart a GNU screen session (on a remote ssh connection)? When I try it, I get:
avilella@remote-machine-002~$ bash
...
-2
votes
1answer
42 views
Recursively delete a line from JS files [closed]
Please help me with writing a shell script that deletes line from virus JS files recursively.
String to remove: http://pastebin.com/ExjCK8GL
0
votes
0answers
19 views
Mac Terminal - Changing the $ Prefix [closed]
Possible Duplicate:
Is it possible to change my terminal window prompt text?
Is it possible to change the $ prefix in the terminal to another character? I would like to change $ to ⚡.
...
2
votes
0answers
36 views
Edit file description shell new menu
I've searched a lot but I cannot find a complete solution, I want to edit the file description in the explorer new file menu
now i have:
Explorer right-click > New > Notepad++ Document to ...
0
votes
1answer
41 views
Bash Script for loop that is breaking lines up instead of using the whole line
I am writing a very simple script and I'm getting stuck on something stupid. Basically I have text file in which each line is comprised of 3 words separated by a space. When you cat the file it ...
0
votes
3answers
33 views
What will happen when I 'cat' 'ksh'?
I used the following command in my unix box.
$ cat ksh
And it gave a rolling log of latin and greek letters and symbols and it kept on going with no signs of stopping. Eventually I had to close my ...
4
votes
3answers
270 views
Byobu versus gnu screen versus tmux
So far I have used konsole to manage multiple shell sessions but it seems that byobu, gnu screen, and tmux offer a better support for multiple shells. I have never used neither of them before. One of ...
2
votes
2answers
69 views
Redirect output of gnome-terminal to file
I have written a script which opens a new terminal using gnome-terminal. The output shown on gnome-terminal is correct. I want this output should be in some file. I have tried this:
gnome-terminal ...
3
votes
1answer
30 views
How to save shell history more conveniently in tcsh?
I'm using tcsh quite extensively and have several questions about it's history:
Is there a way to save commands for different shell tabs separately?
Is there a way to save commands by session (for ...
0
votes
0answers
91 views
RT-N66U Tomato Shell Parameter Bug [closed]
Symptom:
Shell scripts with a first line of "#!/bin/sh", when running, have a wrong value for "$1",
about half the time.
Most often what is returned is $0, with the first character removed.
...
1
vote
1answer
53 views
how to get rc shell to read .rcrc on startup on ubuntu?
I am trying to use rc as my login shell in Ubuntu (using chsh). I noticed that it does not read $HOME/.rcrc file on startup. The documentation says that if invoked as a login shell with either ...
2
votes
2answers
81 views
Convert symbolic links into corresponding target files
I have several symlinks to other files in a directory. I want to convert these links into independent files.
Is there a command that does this?
1
vote
1answer
25 views
Alternate shell behaving strangely
I set up my default shell on ubuntu to be sudosh2 instead of the default /bin/bash.
Now when I ssh into the account, I get some presumably bare-bones shell behavior (only $ prompt, arrow keys result ...
0
votes
3answers
89 views
Move files using Windows shell over network using Linux
I have a Windows laptop whose display isn't working, and I have to get some data from it.
I want to get access to the Windows shell in order to move some files, and all I have access to is a network ...
1
vote
2answers
19 views
Is target in ln -s must be a full path file name?
I've tried to invoke "ln" in directory ~/download as this:
ln -s ./abc ~/abc [EDITED]
but it does't work.
I do "ls -al " in my home and get wrong link of abc.
ln [OPTION]... [-T] TARGET LINK_NAME ...
0
votes
1answer
60 views
Environment Variables and Shell Rc File
I am trying to automatically establish a connection with Amazon s3 using keys. This documentation provides instructions but I am unsure of how to set environment variables and where my shell rc file ...
2
votes
1answer
46 views
Creating a batch file to launch the currently opened applications and folders
Example: If I were viewing example.txt in a Notepad and editing an image in GIMP, I'd like to generate a batch file that would launch those files using those applications after I've closed the ...
0
votes
1answer
53 views
Should we systematically use `--` when executing `rm`?
A question about the recommended usage of rm and --
Let's say I've created two files -i and xx. If I try to remove them with
$ rm *
I get:
rm: remove regular file `xx'? n
And, as explained in ...
4
votes
1answer
77 views
What does “cd !$” mean in bash, and what other substitutions like these can I use?
I've seen somebody do:
cp . yy/
cd !$
the last line translated to:
cd yy/
so I think !$ means "the last argument from previous line".
Am I right?
Are there any other substitution of this ...
1
vote
2answers
45 views
Is the zero exit status different to that of boolean logic when using the Linux shell?
I understand that if I execute a command in the shell with the ampersand operators e.g. command1&&command2 and should the first command execute successfully it does so with a zero exit status. ...
6
votes
3answers
255 views
Why I have to type “./” always before an executable to execute it in Linux?
When I compile e.g. x.c by:
GCC x.c -o x
To execute result I have to write:
./x
And just typing:
x
Fails with this message:
x: command not found
This means Linux does not search current ...
0
votes
0answers
37 views
how to separate source code and data while minimizing directory changes during working? [closed]
This is a general software engineering problem about working on Linux. Suppose I have source code, mainly scripts. They manipulate text data, take text files as input and output. I am thinking about ...
1
vote
3answers
100 views
How come cd doesn't work in my shell script?
SOLVED
I'm trying to make a shell script on my Linux Amazon-EC2 server that will start my Minecraft server but the cd command says it can't find the directory or file when I try to change to the ...
0
votes
0answers
13 views
et_start.sh for centOS
When i start the server with the command "sudo et ./et_start.sh" it opens the console with errors.
----- R_Init -----
...loading libGL.so.1: Initializing OpenGL display
...setting mode 4: 800 600
...
2
votes
1answer
29 views
restarting shell process in buffer
In emacs, I often have multiple shell buffers open and use rename-buffer to keep track of them. Sometimes I inadvertently close the shell by hitting too many ^D's, or I'm on a system that ...
0
votes
6answers
259 views
Why is sudo bash needed?
I was reading the following code:
$ sudo bash
# cd /home/
# ./gitpull.sh
Why do I need the first line, what does it do exactly? What if I just did $ sudo instead of $ sudo bash ?
1
vote
1answer
66 views
cd Command Linux and Mystery Flags
Platform: CentOS 6.2 Shell:tcsh
I'm playing around with cd for a BASH script, and noticed the wondrous cd - option, but was left with many questions...
Why the cd -? Isn't this redundant with cd ...
0
votes
2answers
43 views
Passing optional extra environment settings to the shell at Konsole launch time
I have a bunch of different "hats" on my computer, including multiple on-the-go projects (e.g., $work, a few projects on github, some on Sourceforge, some I'm involved with, some I just follow, etc.). ...
1
vote
2answers
59 views
Retry dropped ssh connections
I use ssh -L -g, but intermittently the connection is lost, thus:
$ ssh -L 8080:localhost:8080 example.com -g
Last login: Tue Apr 24 07:19:04 2012 from 203.0.113.123
Read from remote host ...
2
votes
2answers
65 views
How to echo a command then run it?
How to print a command (echo it), then run it in a single command ?
This is useful when you have some alias/function and wants to print what the command is before running the command.
This would be ...
3
votes
2answers
64 views
Missing segfault output in Linux terminal when running with “&”
I am debugging an application that has to run with other components. I am wrapping everything in a script:
#!/bin/bash
./component1 > 1.log &
./my_application &
./component2 > 2.log ...
