A shell is software that lets users interact with the operating system, usually by typing at a command-line.

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2answers
7k views

change default shell from zsh to bash

I'm trying to change my default shell in RHEL5 from zsh to bash. I tried to the methods mentioned in this thead. By typing sudo /usr/bin/chsh -s /bin/bash, the system says sudo: /usr/bin/chsh: ...
14
votes
9answers
11k views

How do I copy file named starting with a dot?

I am trying to copy all files under directory A to directory B. All files under directory A are starting with dot, for example: A/.a A/.b A/.c which I found if I use: cp A/* B, always get error: ...
13
votes
3answers
4k views

How can I launch a file properties dialog from the command line?

It's simple programmatically with ShellExecute to specify the properties verb when instructing Windows to open a file, but can this be done from the command line or run box? Ideally I'd like to do ...
11
votes
4answers
3k views

BASH history truncated to 500 lines on each login

For some reason, I cannot get my system to keep my BASH history after a reboot. Here are the relevant sections of my ~/.bashrc: shopt -s histappend PROMPT_COMMAND='history -a; updateWindowTitle' ...
9
votes
4answers
9k views

Run a GUI app on remote computer from SSH

I want to run a GUI application on my Ubuntu computer, but it should started by a shell script on my Debian server trought SSH. Is this possible?
8
votes
8answers
6k views

Ending a process in unix instead of interrupting it

At the unix command line if i press Ctrl-C,that does not end a process but rather interrupts it and i return to the shell prompt. So,i have the following two questions: 1.Is there a way i can see the ...
8
votes
3answers
15k views

Is it possible to use putty as the UI for the Windows shell?

PuTTY is much better than cmd.exe. Can I use PuTTY to execute Windows commands?
7
votes
2answers
3k views

Smart tab completion (for directories)?

Are there shell versions that have a more intelligent tab completion? I'd like to be able to type cd foo-<TAB> Then it would show me the possible completions along with numbers that I can ...
6
votes
2answers
906 views

Potential issues with adding /usr/local/[s]bin to root's path?

I've noticed that the root account $PATH does not include /usr/local/bin or /usr/local/sbin by default. Are there any potential issues that could arise from adding those directories to the path? If so,...
5
votes
4answers
2k views

Does “chmod 777 .* -R” chmod parent directories (..)?

Does chmod 777 .* -R change the mode of parent directories (..) recursively?
5
votes
1answer
4k views

Bash, how to globally fix ^H and ^? backspace problems

I'd like to fix this frequent problem where the shell on a remote server thinks my terminal's backspace key is ^? and sometimes it thinks it is ^H, and happens to be incorrect and outputs the wrong ...
5
votes
4answers
18k views

How do you replace the logon shell with iexplore?

This is related to my previous question. Apparently I didn't know what I thought I knew.. Like said in my last post, I am looking to make a kiosk where when it starts up, it goes straight into ...
5
votes
4answers
3k views

Convert symbolic links into corresponding target files [duplicate]

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?
4
votes
3answers
726 views

linux shell, keep task alive for specified time

I am looking for a tool to keep a task alive (restarting if necessary) for a specified amount of time (in seconds), and then kill it and stop. For example: keep_for 3600 rsync foo bar:faz should for ...
4
votes
1answer
1k views

Shell scripting: Way to parse parameters from command line

myscript [-a a-arg] [-c c-arg] [-b] [-e] somedirectory Given that I want my shell script be invoked at the command line using the above parameters - where [these brackets] denote that they are ...
3
votes
1answer
5k views

OS X (Unix) shell command: possible to get last opened date of file?

when you use the following command find /Users/someUser/someFolder/* -type f -mtime +90 you'll get all the files that have a modification date that is bigger than 90 days. If you open however the ...
3
votes
2answers
299 views

What is the equivalent of root in Windows 8.1, and how can I open a shell in that context? [duplicate]

I've heard the equivalent of root is the "SYSTEM" account. But I used a tool called "RunAsSystem" to open a shell as SYSTEM, and I'm still getting "access denied" errors even though I know the files ...
2
votes
1answer
20k views

Call putty/plink to start a remote SSH linux script with user input

Seemingly simple question, which yields slightly undesired results. Execute putty to start a script on a remote linux server which requires user input The remote script does a read -p "Please enter ...
2
votes
8answers
2k views

Why does “ls -a” hide some existing directory from the root user?

Today I found something really interesting (at least to me) on one of our test servers: I can change into an existing directory from my actual working directory using a relative path, but that very ...
2
votes
1answer
977 views

Easy way to columnize STDOUT (format text in columns)?

I just want an easy way to columnize output to the terminal. Don't care about colors. (Well, actually I do quite a bit! But there is the awesome, easy-to-use ANSI Color for that.) Shell scripts ...
2
votes
3answers
750 views

What escape code do I need in PS* to make sure terminal is back in normal settings on shell prompt?

Sometimes I accidentally cat some binary data; sometimes some ncurses program crash - for plenty of reasons terminal can end up in bad state, requiring manual reset. This is happening too often. Such ...
2
votes
2answers
2k views

How to check what slows down my terminal startup?

Is there a way to check what slows down my terminal startup? I'm using zsh with ohmyzsh on iTerm2. It takes about 10 second to open a new window :( This is my zshrc file: export PATH=/usr/local/...
0
votes
2answers
288 views

Putting code into registry command key

I'm trying to do what's done in this question, but I want to attach it to a context menu on Directory so I can right-click on "Flatten Folder" and have it do it for me. That is, bring all the ...
11
votes
3answers
16k views

TortoiseSVN overlay icons do not appear when installed by a different user account?

I've installed TortoiseSVN on my work Windows XP machine as the administrator. When I login in as a standard user my working copies do not display the overlay icons in Windows Explorer. I found this ...
9
votes
6answers
8k views

Clear stdin before reading

I have the following bash script: # do some time consuming task here read -p "Give me some input: " input Now as you might have guessed, if a user presses some random keys during the "time ...
8
votes
4answers
882 views

Running `exec` with a Bash built-in

I defined a shell function (let's call it clock), which I want to use as a wrapper to another command, similar to the time function, e.g. clock ls -R. My shell function performs some tasks and then ...
7
votes
5answers
15k views

rsync using regex to include only some files

I am trying to run rsync to copy some files recursively down a path based on their file name pattern, case insensitive. This is what I have done to run rsync: $ rsync -avvz --include ='*/' --include='...
7
votes
6answers
9k views

Why does my LD_LIBRARY_PATH get unset launching terminal?

I have a shell script to set up some environment variables and launch whatever program I send in as an argument: export PATH=$HOME/local/bin:$PATH export LD_LIBRARY_PATH=$HOME/local/lib:$...
7
votes
3answers
1k views

`which python` points to the python I want, but `python` runs the wrong version

I want to use python24 provided by ports, so I've installed it, and python_select -s shows that the version I want is indeed selected. Running which python gives /opt/local/bin/python, and running /...
6
votes
4answers
3k views

Windows 7 - Add shell command for .png file

On Windows XP, you could go to Folder Options - File Types, select PNG, create a new action, such as this Action: Crush Application: "F:\Programs\PNGCrush\crush.bat" "%1" So you can right click on ...
3
votes
3answers
4k views

How to store a Unix alias?

I know I can create an alias for untar like this alias untar=’tar -xvzf’ How do I make this persist from session to session, because it seems it is lost when I reconnect?
3
votes
1answer
2k views

How to delete readonly variable in bash?

$ mySite="superuser" $ readonly mySite $ unset mySite bash: unset: mySite: cannot unset: readonly variable How can we delete mySite, as it is a readonly variable?
3
votes
1answer
894 views

Parse multiple HTML to text and rename as parent Directory

In a directory there are many folders .html inside, I would like all HTML parsed as new .txt with the name of the parent directory. Example1/ Index.html>Example1.txt Example2/ Index.html>Example2....
3
votes
2answers
423 views

Is there a folder-specific .bashrc or .bash_profile?

Is it possible to have a bash script (like a .bashrc or .bash_profile, basically) that is executed only upon cd’ing into a specific folder?
3
votes
1answer
1k views

grep fails in upstart script

I have an upstart configuration for a service which needs to check the existance of a process on it's startup. This sounds fairly easy but I'm already trying for 3 hours to get this thing solved and I'...
2
votes
1answer
532 views

Invoke zsh, then *source* another file (while entering interactive mode)

This question is of course related, but different to the one about executing a command. That questions’ solutions involve either starting a subshell – which isn’t possible due to the requirement of ...
2
votes
4answers
2k views

A decent remote shell from UNIX to Windows? [closed]

I'm on Linux and develop on a Windows 7 box virtualized via VirtualBox. My usual way of developing consists in editing source files from Linux via nautilus/SMB (smb://192.168.1.4/...) then when I'm ...
2
votes
1answer
503 views

Linux shell: how to add prefix string to stderr message?

I am running several tasks simultaneously at background. command_a | tee > command_a.log & command_b | tee > command_b.log & If everything is fine, then messages will be saved to log ...
2
votes
1answer
158 views

What this command :(){ :|: & };: does? [duplicate]

What does this shell command do in Linux :(){ :|: & };: How can it be used in Denial of Service attacks?
2
votes
2answers
8k views

Terminal emulator with split panes for Mac OSX

I'm looking for a terminal emulator on Mac OSX with a specific feature: to be able to split the console window into multiple panes. It's a great feature of Terminator for gnome, I think this image ...
2
votes
2answers
2k views

Tool for diffing large files

When I use "diff" to find the difference between two large data files, diff A.txt B.txt > dif.info it is output: diff:memory exhausted or add the argument "-H" diff -H A.txt B.txt > dif....
2
votes
0answers
649 views

“Error: AudioQueueStart failed” when running afplay repeatedly

Every time a run in Terminal the command: while :; do afplay "/Users/username/Library/Application Support/Nada/Bell.aif"; sleep 10; done I get the expected result, but after a while the ...
2
votes
2answers
268 views

History of commands?

Is there any way to find which commands have been executed between 2 specific dates (like 2 to 3 months period)? I can use the history command, but I have powered the system on/off. Is this ...
1
vote
2answers
2k views

Diff and ignore lines missing in one file

I want to diff two files and ignore lines that are present in one file but missing in the other. For example File1: foo bar baz bat File2: foo ball bat I'm currently running the following diff ...
1
vote
4answers
4k views

How can I get Linux to interpret keyboard charaters properly?

I access a linux server shell via putty, but many of the keys I use do not translate across, up, down, left and right all are seen as ^[[A, ^[[B, ^[[D and ^[[C; But so is C-up, C-down, C-left and C-...
1
vote
2answers
619 views

run any shell script from Fish and import all exported env variables?

Is it possible somehow to import all environment variables which are exported by a subprocess started by Fish? E.g. from my Fish session, I start bash ~/.profile, which exports some variables and I ...
1
vote
3answers
2k views

Alias to open gVim (Cream version) from Cygwin shell

I'm using the Cream version of gVim, and i'd like to make an alias to open files from a Cygwin shell in Cream. Running the gVim executable from Cygwin gives the following error (in a Windows cmd ...
0
votes
1answer
218 views

Sed replace line stored in a variable

I need to find a line that starts with mysql.unmetric.twt.url and replace the entire line with line stored in the variable ip. ip="mysql.unmetric.twt.url=jdbc:mysql://ec2-a-b-c-d.compute-1.amazonaws....
0
votes
2answers
233 views

sum numbers in different lines in shell

i have 8000 lines similar to this <Flow flowId="1" timeFirstTxPacket="+0.0ns" timeFirstRxPacket="+924100.0ns" timeLastTxPacket="+199984927558.0ns" timeLastRxPacket="+199675473275.0ns" delaySum="+...
0
votes
2answers
417 views

Removing duplicate files, keeping only the newest file

I'm trying to clean up a photo dump folder, in which several files are duplicated but with different filenames or lost in subfolders. I've looked at tools like rmlint, duff and fdupes, but I can't ...