Zsh is a shell with many advanced command-line and scripting features.

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zsh alias being overridden somehow

I'm on a system running OS X 10.8.5. I recently tried to alias ls to ls -G -la command. I opened up ~/.zshrc, put in the alias, relaunched the terminal, but the change didn't take effect. Upon ...
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2answers
482 views

Multi-month view in calendar (cal) in OS X

I am hoping to run some of the commands listed in this article, e.g.: cal -3 which is supposed to show me the last month, this month, and next month. This command does not work in OS X. $ cal -3 ...
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1answer
93 views

How to declare some aliases dynamically in zsh?

I would like to declare a few shortcut commands to switch between my various coding projects, so I have come up with the following script. projects=$(ls -d ~/Workspace/*/) prefix="/Users/myuser/...
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2answers
261 views

What is causing `diff` to run `git diff`?

I'd like to use diff as described here and in the documentation I see when I type man diff. However, when I type diff, what I get is this: ~ ❯❯❯ diff usage: git diff --no-index <path> <path&...
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2answers
637 views

Thousands separator in printf in zsh

I have been trying to define a thousands separator in printf for a while now and I have discovered that zsh has some problems with it. In bash I can use something like: $ printf "%'d\n" 1234567890 ...
3
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1answer
141 views

What is the best way to pipe the output of a command through a pager if (and only if) it is too long?

I'd like to be able to be able to wrap a command so that if its output doesn't fit in a terminal it will be automatically piped through a pager. Right now I'm using the following shell function (in ...
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1answer
34 views

strange setopt behavior

For certain options, setopt doesn't have an effect. ➜ ~ setopt | grep history extendedhistory ➜ ~ setopt appendhistory ➜ ~ setopt | grep history # appendhistory apparently didn't get set ...
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2answers
7k views

How to display the name of the current Virtualenv?

I'm using virtualenv, virtualenvwrapper, zsh, oh-my-zsh, terminator, on Crunchbang. I'm trying to display the name of the current virtualenv like so workon example (example)... I've tried many ...
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1answer
167 views

How to create string with invalid unicode characters, in Zsh?

For some testing purposes I need a string with invalid unicode characters. How to create such string in Zsh?
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4k views

Spaces as line breaks from inline for loop command

Someone care to enlighten me as to why the spaces in the first command seem to be interpreted as line breaks? Also occurs substituting print for echo. $for l in $( find *.txt -exec head -1 {} \; ); ...
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How to use `which` on an aliased command?

Like most users, I have a bunch of aliases set up to give a default set of flags for frequently used programs. For instance, alias vim='vim -X' alias grep='grep -E' alias ls='ls -G' The problem is ...
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3answers
189 views

Repeating command with different filenames

Here's a layup for someone... I'm having to run a command repeatedly: $ wp input csv MyCSV01.csv directory_name $ wp input csv MyCSV02.csv directory_name $ wp input csv MyCSV03.csv directory_name ...
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1answer
351 views

/etc/paths in OS X and other Unices

Is /etc/paths read by every shell that I run in OS X? For example, if I use zsh, will it parse /etc/path to populate $PATH? What exactly is the sequence that OS X follows to populate $PATH? Does it ...
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3answers
431 views

${#array} vs ${#array[@]}

As far as I can tell both ${#array[@]} and ${#array} evaluate to the number of elements in $array. Is there any reason for preferring the longer form (${#array[@]})?
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3answers
433 views

Why rm exclude using ! doesn't work in zsh?

I have 10 files in current directory: 10test 1test 2test 3test 4test 5test 6test 7test 8test 9test I want to remove all file except 2test and 3test, but I run command rm !(2test|3test) doesn't work....
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1answer
100 views

move files based on pattern with zsh/zmv

How could I move files to subdirectories based on the common part of their names? For example, with files named as comment_LastName.pdf and comment_LastName.md and sub-directories named as ...
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1answer
53 views

How to create multiple dot files using brace expansion?

I want to create a bunch of dot files using brace expansion, but it doesn't work: touch .{a..h} the result is a file .{a..h} is created instead of .a .b .c ...
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2answers
86 views

Unexpected prompt in zsh

Can someone explain to me why I am getting this shell prompt when I'm in the /home directory, and how to get rid of it?  I am using zsh. I want it to display only the following: user@host ~ % but ...
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7answers
373 views

Check variable is an array in Bourne like shell?

In Bourne like shell which support array variable, we can use some parsing to check if variable is an array. All commands below were run after running a=(1 2 3). zsh: $ declare -p a typeset -a a a=(...
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2answers
291 views

Shell valid function name characters

Using extended Unicode characters is (no-doubt) useful for many users. Simpler shells (ash (busybox), dash) and ksh do fail with: tést(){ echo 34; } tést But bash, mksh, lksh, and zsh seem to ...
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0answers
32 views

Fill the name of last-run program in Bash

Suppose I execute some command: ls -l ~/some_dir. I would like to create an alias, such that I could execute man with the name of the last-run program as a parameter, i.e., man ls in this case. ...
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0answers
166 views

How to change theme with zsh

I am using this configuration on my mac(unix) to customize my shell. I am using zsh instead of bash and there are too many things along with zsh. This .dotfile configuration contains vim, zsh, git, ...
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2answers
52 views

how to grep for packages on basis of uncompressed file-size?

In Debian when you look at a package, you get lot of info. Including the uncompressed file size of the package. Is there a way to grep through the file-listing so that packages appear either from ...
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3answers
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key bindings table?

Do we have a key bindings table that translates all the various ways of referring to a key press? I'm using zsh, but I presume that if there was such a table it would work for any shell. The reason I ...
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4answers
186 views

Right-to-left shell brace expansion

In zsh (and other shells), if I include an argument like (for example): {a,b,c}{d,e,f} brace expansion turns it into: ad ae af bd be bf cd ce cf For my purposes, the argument order is important, ...
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Is “Arithmetic Expansion” the expected action on vars inside `[[` tests?

This script: a=2 [[ "$a" -eq 2 ]] && echo yes1 [[ $a -eq 2 ]] && echo yes2 [[ a -eq 2 ]] && echo yes3 [[ "a" -eq 2 ]] && echo yes4 Does not work in dash (and ...
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2answers
87 views

Shebang line for “run with $SHELL”

I'm looking for what to put on my_zsh_script.sh's "shebang line" that would have the same effect, portably, as $SHELL my_zsh_script.sh IOW, I looking for the valid equivalent of #!$SHELL or #!/...
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0answers
789 views

How to combine zsh autocomplete for wrapper function arguments and existing command

I work mostly in gvim and many terminals. Originally, I preferred to open all my files in a single vim instance. To that end I used an alias to open files from my terminals in the current 'vim ...
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46 views

Setting tmux session title in zsh [closed]

There was a similar question about screen regarding this here, but I was unable to get this working with tmux. From what I understood printing a string with prepended with \033k and appended with \033\...
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1answer
164 views

Replace current process by its coprocess/child

I have a program P that expects to receive "Hello" and output "Why?" before providing a feature. This feature is used by other programs that are not aware that it is common courtesy to start a ...
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4answers
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Share aliases and PATH setting between zsh and bash

The shell that I normally use is zsh. I have several aliases to enable color in some programs such as ls and grep. I've also set my custom path so that I can execute programs in non-standard place (...
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1answer
120 views

In zsh, what's the difference between &! and &|?

In my adventures with disown, I also discovered that in zsh, program &! starts and immediately backgrounds and disowns the program, so you can close the shell without the program getting a SIGHUP. ...
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2answers
44 views

Forcing the expansion of a global alias in part of a word

I have a couple of scripts /tmp/foo/bar.sh and /tmp/foo/baz.sh, the look like this: # /tmp/foo/bar.sh alias -g __FILE__='${(%):-%x}' alias -g __DIR__='${${(%):-%x}%/*}' printf "sourcing %s\n" ...
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0answers
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On using $hash_array[$(global_alias)]

Identical code works on one system, fails on another: % zsh --version zsh 5.0.7 (x86_64-pc-linux-gnu) % typeset -A frobozz % alias -g foo='echo xyz' % frobozz[$(foo)]=9 % echo ${(kv)frobozz} xyz 9 ...
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`ls\` logs out of terminal session?

Like many, I have an alias ll=ls -l[.]+ set. A moment ago, I typed ll and then accidentally hit \ on the way to return. I hit return again to finish the command (on the continued line prompt), ...
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0answers
53 views

How to avoid namespace collisions/pollution in a script meant to be sourced?

I want to implement a script foo.sh that culminates in the an execution of a command bar (with some arguments). The command bar modifies the current shell environment, which means that foo.sh must be ...
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1answer
56 views

How to reuse file pattern in .gitignore in bash/zsh?

Here is the content of the .gitignore cron.yaml build target webview *.pyc *.sublime-workspace .idea *.rej .coverage app/tools/temp_*.py app/tools/*/temp_*.py I am currently iteraring files in a ...
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7answers
278 views

How can I apply `cut` to several files and then `paste` the results?

I often do operations like paste <(cut -d, -f1 file1.csv) <(cut -d, -f1 file2.csv) which is very tedious with more than a few files. Can I automate this process, e.g. with globbing? I can ...
7
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3answers
113 views

'switch' based on shell

I would like to source (i.e. not call) a script from any shell (bash/csh are the primary targets, but fish, zsh, ksh, and rc would also be interesting). I would like if the script can be a single ...
2
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2answers
167 views

Arrays in Zsh. Check if any of the following variables is not defined

Say we have a set of variables that we want to test if they are defined, and set a condition if any of them are not. I am thinking of proceeding with something like the following: #!/usr/bin/env zsh ...
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2answers
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For input redirection, are there functional differences between bash/zsh <<<“$(<file)” and the traditional <file?

I'm asking only about the usage which would have the similar effect as traditional input redirection from a file. <<<"$(<file)" as far as I can tell is equivalent to <file It ...
3
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1answer
379 views

Dynamic zsh autocomplete for custom commands

I'm trying to write completion functions for some custom functions I wrote, but seem to be really struggling with even the most basic ones. An example function is: function eb_instances() { if [...
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2answers
574 views

How can I make commands appear bold in zsh?

I have set up my bash shell so that any commands I type appear in bold and the commands' output is shown in normal weight: I did this by adding \e[01m at the end of my PS1 variable to turn on bold, ...
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2answers
1k views

What does `zstyle` do?

zstyle seems like it's just a central place to store and retrieve data, like an alternative to export. Is that true, or is there more to it?
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1answer
295 views

How to edit shell prompt to show time?

I would like to edit my shell prompt to display time. I am currently using zsh, though I would like the customize the shell prompt to show time. I understand that an echo $PS1 will give me the ...
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0answers
239 views

How can I make my Zsh theme (“fade”) look good in urxvt?

I am using Arch Linux and as a newbie I don't have any preference for a terminal emulator yet. Since rxvt-unicode seems to be the most popular one, I thought I'd try that first. I'm configuring it ...
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2answers
7k views

Have backticks (i.e. `cmd`) in *sh shells been deprecated?

I've seen this comment many times on Unix & Linux as well as on other sites that use the phrasing "backticks have been deprecated", with respect to shells such as Bash & Zsh. Is this ...
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1answer
49 views

zsh-completion: Completing two parts of an argument, separated by a colon

I'd like to set up zsh completion for a command which has a single argument of the form scheme:parameter. Suppose I have commands which can return all possible schemes, and all possible parameters. ...
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3answers
1k views

oh-my-zsh completion on home directory names

I recently switched to zsh from bash, and I'm using oh-my-zsh. There's a completion behaviour I don't want: in any directory, the list of autocompletion candidates seems to include the names of all ...
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1answer
280 views

How to setup Mac OS X Terminal on bash and iTerm2 on zsh

I attempted to setup bash shell by default on Mac OS X (Yosemite) Terminal app and zsh shell by default on iTerm2 app. However, it is either bash shell or zsh shell for both the apps. $ chsh -s /bin/...