I have successfully changed text in linux using this shell script
vi -e .bash_profile << END
i
PATH=\$PATH:\$HOME/bin:/usr/pgsql-9.4/bin
export PATH
PGDATA=/usr/pgsql-9.4/data
export PGDATA
.
w
q
END
but I have a problem.
If I execute script twice then duplicate in text file.
So, I want to prevent this situation. How Can I fix it?
Well that depends... if the string "PATH=$PATH:$HOME/bin:/usr/pgsql-9.4/bin" can appear at other places in side the file then we could not use it as an indicator that your vi has already done its work. But if the string otherwise does not appear we could wrap the whole thing
grep -q 'PATH=[$]PATH:[$]HOME/bin:/usr/pgsql-9.4/bin' .bash_profile
if [ $? -eq 1 ]
then
# do your vi stuff here
fi
You might replace the if stuff by
test $? -eq 0 && exit 0
if you were not going to do anything after the vi stuff
I'm new to linux and working in the terminal, and wrote a function to see if I'm on the company network or not
function isCompanyNetwork() {
if [[ $(ipconfig getifaddr en0) == 3.* ]] || [[ $(ipconfig getifaddr en1) == 3.* ]] ;
then
echo yes
else
echo no
fi
}
however, when i type the following in my terminal: isCompanyNetwork
I get:
-bash: isCompanyNetwork: command not found
what am I doing wrong?
Add this function to your ~/.bashrc
I'm guessing you wrote this in a file? If it's .bash_profile or .bashrc, you need to relog in or source the files (i.e. . ~/.bash_profile). If you did this at the command line and haven't logged out, you can see your defined fuctions by typing declare -F. Make sure isCompanyNetwork is there, or you did something wrong (created it in another window?).
I have a symlink to an executable, which I've created as follows:
$ ln -s /home/x/app/wps_office/wps
If on the commandline I type:
$ /home/x/app/wps_office/wps
Then my application launches correctly, but if I try to launch my application through the symlink, then I get the following error:
$ wps
wps does not exist!
Just to make sure if the symlink is correct;
$ readlink wps
/home/x/app/wps_office/wps
The folder /home/x/bin is where I've created the symlink, this folder is included in my $PATH variable.
I don't see what is going wrong here, why doesn't my application execute when I use the symlink?
Quick update;
I've just quickly looked trough the contents of the file where the symlink is pointing to, it looks like the message wps does not exist is actually coming from the application, meaning the symlink is actually correct. I don't know the exact reason why, as I find it strange that everything works correctly when I don't use the symlink. I need to look more thorougly to the code to find that out.
The code of the file where the symlink is pointing to:
#!/bin/bash
gOpt=
gTemplateExt=("wpt" "dot" "dotx")
gBinPath=$(dirname "$0")
if [ -d "${gBinPath}/office6" ]; then
gInstallPath=${gBinPath}
else
gInstallPath=/opt/kingsoft/wps-office
fi
gApp=wps
function parse_arg()
{
if [ $# -eq 1 ] ; then
ext="${1##*.}"
if [ "" = "${ext}" ] ; then
return 0
fi
for i in ${gTemplateExt}
do
if [ "${ext}" = "${i}" ] ; then
gOpt=-t
fi
done
fi
}
function run()
{
oldPwd="${PWD}"
if [ -e "${gInstallPath}/office6/${gApp}" ] ; then
if [ -d /usr/lib32/gtk-2.0 ]; then
export GTK_PATH=/usr/lib32/gtk-2.0
fi
${gInstallPath}/office6/${gApp} ${gOpt} "$#" || ${gBinPath}/wps_error_check.sh ${gInstallPath}/office6/${gApp}
else
echo "${gApp} does not exist!"
fi
}
function main()
{
parse_arg "$#"
run "$#"
}
main "$#"
Note the line where it says echo "${gApp} does not exist!", this is where my error is coming from.
Commands will only be executed without any path elements if they're part of the shell, or if they're in the PATH environment variable. Try
./wps
in the directory where the symlink is. Also confirm that the permissions are correct.
Change the line
gInstallPath=/opt/kingsoft/wps-office
in the script to
gInstallPath=/home/x/app/wps_office
The file where the symlink was pointing to, takes the current directory to launch a different file. This is the file actually being launched. The issue can be solved by simply creating a symlink to this file, which means a symlink to /home/x/app/wps_office/office6/wps
Another option is to edit the source file itself, as explained by #Pixelchemist. However as it concerns an application which I've downloaded and which I will probably update in the future, I think in this case that is not a preferred option.
There are many questions asking about accessing the Sublime Text 2 editor from the command line. The responses, in summary, are to make a symlink, alias or simple shell script to run the appropriate sublime_text command. I can do that. What I want is to make the linux version behave like the MacOS version.
On MacOS, I have the following:
ln -s /Applications/Sublime\ Text\ 2.app/Contents/SharedSupport/bin/subl ~/bin/subl
Then in my .zshrc:
alias subl="$HOME/bin/subl -n"
export EDITOR="$HOME/bin/subl -n -w"
This does two things. It gives me a subl command that opens any files given on the command line in a new window. The subl command does not block the terminal. It also sets up my editor to open sublime text to edit the arguments, but this time it does block. In particular, $EDITOR blocks until its arguments are closed. It does not block on unrelated sublime text windows.
I can achieve a similar effect on linux with the following:
In ~/bin/subl:
#! /bin/zsh
$HOME/Sublime\ Text\ 2/sublime_text -n $# &
and then in ~/bin/subl_wait: (think mate_wait for TextMate users)
#! /bin/zsh
exec $HOME/Sublime\ Text\ 2/sublime_text -n -w $#
I can then set EDITOR to subl_wait, and things almost work. subl opens files for editing and doesn't block. subl_wait opens files for editing and does block.
The problem is that subl_wait is waiting until all open files are closed, not just its arguments.
Is it possible to get this working perfectly?
Looks like I've found the issue. (Thanks to this post: http://www.sublimetext.com/forum/viewtopic.php?f=2&t=7003 )
Basic point: sublime behaves differently depending upon whether an instance is already running!
If an instance is already running then sublime on linux behaves similarly to MacOS. If no instance is running then the terminal blocks until you exit sublime.
With that in mind, we just need to modify the scripts to make sure sublime is running:
in ~/bin/subl_start:
#! /bin/zsh
if [ ! "$(pidof sublime_text)" ] ; then
# start sublime text main instance
# echo "Starting Sublime Text 2"
$HOME/Sublime\ Text\ 2/sublime_text &
sleep 1 # needed to avoid a race condition
fi
in ~/bin/subl:
#! /bin/zsh
. $HOME/bin/subl_start
exec $HOME/Sublime\ Text\ 2/sublime_text -n $#
in ~/bin/subl_wait:
#! /bin/zsh
. $HOME/bin/subl_start
exec $HOME/Sublime\ Text\ 2/sublime_text -n -w $#
Note that I've used the -n flags everywhere. This might not be your cup of tea. If you are using -n then you possibly also want to look at your close_windows_when_empty setting.
Inspired by the OP's answer, I've created a bash wrapper script for Sublime Text that incorporates all your findings and runs on both OSX and Linux.
Its purpose is threefold:
provide a unified subl CLI that works like ST's own subl on OSX: invoke ST without blocking, unless waiting is explicitly requested.
encapsulate a workaround for the waiting-related bug on Linux.
when saved or symlinked to as sublwait, provide a sublwait CLI that automatically applies the --wait and --new-window options so as to make it suitable for use with $EDITOR (note that some programs, e.g. npm, require the $EDITOR to contain the name of an executable only - executables + options are not supported); also makes sure that at least one file is specified.
The only open question is whether the OP's approach to avoiding the race condition - sleep 1 - is robust enough.
Update:
Note that subl on OSX is by default NOT placed in the $PATH - you normally have to do that manually. If you haven't done so, the script will now locate subl inside ST's application bundle; (it tries app names in the following sequence: 'Sublime Text', 'Sublime Text 2', 'Sublime Text 3', first in /Applications, then in ~/Applications.)
Here's the output from running the script with -h:
Multi-platform (OSX, Linux) wrapper script for invocation of Sublime Text (ST)
from the command line.
Linux:
Works around undesired blocking of the shell (unless requested)
and a bug when waiting for specific files to be edited.
Both platforms:
When invoked as `sublwait`, automatically applies the
--wait --new-window
options to make it suitable for use with $EDITOR.
Therefore, you can to the following:
- Name this script `subl` for a CLI that supports ALL options.
(On OSX, this will simply defer to the `subl` CLI that came with ST.)
- Place the script in a directory in your $PATH.
- In the same directory, create a symlink to the `subl` script named
`sublwait`:
ln -s subl sublwait
and, if desired, add
export EDITOR=sublwait
to your shell profile.
Note that if you only use OSX, you can make do with ST's own subl and just save this script directly as sublwait.
Script source:
#!/usr/bin/env bash
# Multi-platform (OSX, Linux) wrapper script for invocation of Sublime Text (ST)
# from the command line. Invoke with -h for details.
[[ $1 == '-h' || $1 == '--help' ]] && showHelpOnly=1 || showHelpOnly=0
[[ $(basename "$BASH_SOURCE") == 'sublwait' ]] && invokedAsSublWait=1 || invokedAsSublWait=0
[[ $(uname) == 'Darwin' ]] && isOsX=1 || isOsX=0
# Find the platform-appropriate ST executable.
if (( isOsX )); then # OSX: ST comes with a bona-fide CLI, `subl`.
# First, try to find the `subl` CLI in the $PATH.
# Note: This CLI is NOT there by default; it must be created by symlinking it from
# its location inside the ST app bundle.
# Find the `subl` executable, ignoring this script, if named subl' as well, or a
# script by that name in the same folder as this one (when invoked via symlink 'sublwait').
stExe=$(which -a subl | fgrep -v -x "$(dirname "$BASH_SOURCE")/subl" | head -1)
# If not already in the path, look for it inside the application bundle. Try several locations and versions.
if [[ -z $stExe ]]; then
for p in {,$HOME}"/Applications/Sublime Text"{,' 2',' 3'}".app/Contents/SharedSupport/bin/subl"; do
[[ -f $p ]] && { stExe=$p; break; }
done
fi
[[ -x $stExe ]] || { echo "ERROR: Sublime Text CLI 'subl' not found." 1>&2; exit 1; }
else # Linux: `sublime_text` is the only executable - the app itself.
stExe='sublime_text'
which "$stExe" >/dev/null || { echo "ERROR: Sublime Text executable '$stExe' not found." 1>&2; exit 1; }
fi
# Show command-line help, if requested.
# Add preamble before printing ST's own help.
# Note that we needn't worry about blocking the
# shell in this case - ST just outputs synchronously
# to stdout, then exits.
if (( showHelpOnly )); then
bugDescr=$(
cat <<EOF
works around a bug on Linux (as of v2.0.2), where Sublime Text,
if it is not already running, mistakenly blocks until it is exited altogether.
EOF
)
if (( invokedAsSublWait )); then
# We provide variant-specific help here.
cat <<EOF
Wrapper script for Sublime Text suitable for use with the \$EDITOR variable.
Opens the specified files for editing in a new window and blocks the
invoking program (shell) until they are closed.
In other words: the --wait and --new-window options are automatically
applied.
Aside from encapsulating this functionality without the need for options
- helpful for tools that require \$EDITOR to be an executable name only -
$bugDescr
Usage: sublwait file ...
EOF
# Note: Adding other options doesn't make sense in this scenario
# (as of v2.0.2), so we do NOT show ST's own help here.
else
cat <<EOF
Multi-platform (OSX, Linux) wrapper script for invocation of
Sublime Text (ST) from the command line.
Linux:
Works around undesired blocking of the shell (unless requested)
and a bug when waiting for specific files to be edited.
Both platforms:
When invoked as \`sublwait\`, automatically applies the
--wait --new-window
options to make it suitable for use with \$EDITOR.
Therefore, you can to the following:
- Name this script \`subl\` for a CLI that supports ALL options.
(On OSX, this will simply defer to the \`subl\` CLI that came with ST.)
- Place the script in a directory in your \$PATH.
- In the same directory, create a symlink to the \`subl\` script named
\`sublwait\`:
ln -s subl sublwait
and, if desired, add
export EDITOR=sublwait
to your shell profile.
Sublime Text's own help:
------------------------
EOF
# Finally, print ST's own help and exit.
exec "$stExe" "$#"
fi
exit 0
fi
# Invoked as `sublwait`? -> automatically apply --wait --new-window options.
if (( invokedAsSublWait )); then
# Validate parameters.
# - We expect NO options - to keep things simple and predictable, we do NOT allow
# specifying additional options (beyond the implied ones).
# - We need at least 1 file argument.
# - As a courtesy, we ensure that no *directories* are among the arguments - ST doesn't support
# that properly (always waits for ST exit altogether); beyond that, however, we leave input
# validation to ST.
if [[ "$1" =~ ^-[[:alnum:]]+$ || "$1" =~ ^--[[:alnum:]]+[[:alnum:]-]+$ ]]; then # options specified?
{ echo "ERROR: Unexpected option specified: '$1'. Use -h for help." 1>&2; exit 1; }
elif (( $# == 0 )); then # no file arguments?
{ echo "ERROR: Missing file argument. Use -h for help." 1>&2; exit 1; }
else # any directories among the arguments?
# Note: We do NOT check for file existence - files could be created on demand.
# (Things can still go wrong - e.g., /nosuchdir/mynewfile - and ST doesn't
# handle that gracefully, but we don't want to do too much here.)
for f in "$#"; do
[[ ! -d "$f" ]] || { echo "ERROR: Specifying directories is not supported: '$f'. Use -h for help." 1>&2; exit 1; }
done
fi
# Prepend the implied options.
set -- '--wait' '--new-window' "$#"
fi
# Finally, invoke ST:
if (( isOsX )); then # OSX
# `subl` on OSX handles all cases correctly; simply pass parameters through.
exec "$stExe" "$#"
else # LINUX: `sublime_text`, the app executable itself, does have a CLI, but it blocks the shell.
# Determine if the wait option was specified.
mustWait=0
if (( invokedAsSublWait )); then
mustWait=1
else
# Look for the wait option in the parameters to pass through.
for p in "$#"; do
[[ $p != -* ]] && break # past options
[[ $p == '--wait' || $p =~ ^-[[:alnum:]]*w[[:alnum:]]*$ ]] && { mustWait=1; break; }
done
fi
if (( mustWait )); then # Invoke in wait-for-specified-files-to-close mode.
# Quirk on Linux:
# If sublime_text isn't running yet, we must start it explicitly first.
# Otherwise, --wait will wait for ST *as a whole* to be closed before returning,
# which is undesired.
# Thanks, http://stackoverflow.com/questions/14598261/making-sublime-text-2-command-on-linux-behave-as-it-does-on-macos-x
if ! pidof "$stExe" 1>/dev/null; then
# Launch as BACKGROUND task to avoid blocking.
# (Sadly, the `--background` option - designed not to activate the Sublime Text window
# on launching - doesn't actually work on Linux (as of ST v2.0.2 on Ubuntu 12.04).)
("$stExe" --background &)
# !! We MUST give ST some time to start up, otherwise the 2nd invocation below will be ignored.
# ?? Does a fixed sleep time of 1 second work reliably?
sleep 1
fi
# Invoke in blocking manner, as requested.
exec "$stExe" "$#"
else # Ensure invocation in NON-blocking manner.
if ! pidof "$stExe" 1>/dev/null; then # ST isn't running.
# If ST isn't running, invoking it *always* blocks.
# Therefore, we launch it as a background taks.
# Invocation via a subshell (parentheses) suppresses display of the
# background-task 'housekeeping' info.
("$stExe" "$#" &)
else # ST is already running, we can safely invoke it directly without fear of blocking.
exec "$stExe" "$#"
fi
fi
fi
On Ubuntu Gnu/Linux 13.04 64-bit:
I just keep subl running pretty much all the time. So my git config has:
core.editor=/usr/bin/subl -n -w
And that's all I need. I save the git commit file with ctrl-s, close the window with ctrl-w and I'm done. But I then have to really close the window by hitting the X in the upper corner... 96% perfect.
I have a piece of old code that is trying to assign two unicode characters to one unused Unicode character (sorry, I am not using the right terms, but hopefully it gets the issue across). So U17ff is mapped to "ាំ" etc.
Here's the bash script:
for folder in /usr/X11R6/lib/X11/locale/*UTF-8
do
file="$folder/Compose"
if [ -f "$file" ] # is there a compose file?
then
if grep -q "<U17ff>" "$file" # is there Khmer in the file already
then
echo "Warning: $file includes Khmer already!"
else
cp --backup=t --force -v "$file" "$file" # create a backup file
cat Compose >>"$file" # append Khmer
echo "$file Khmer added"
fi
fi
done
The Compose file is this:
# Khmer digraphs
<U17ff> : "ាំ"
<U17fe> : "ោះ"
<U17fd> : "េះ"
<U17fc> : "ុំ"
<U17fb> : "ុះ"
I think the directory isn't right for this code, so the keyboard it is trying to install doesn't work because the unicode character it calls is still blank (I've used the default Khmer keyboard that comes with Ubuntu, and it doesn't work properly, so I am trying to fix it).
Can anyone tell me the directory I should use rather than /usr/X11R6/lib/X11/locale/*UTF-8
For Ubuntu 11.x?
Thanks,
Nathan
Turns out this was a bigger issue than I thought (it is a bug), but there is a way around it:
Type
sudo gedit /etc/environment
Add a line
GTK_IM_MODULE=xim
Save and close.
4.Then in terminal type:
sudo gedit /usr/share/X11/locale/en_US.UTF-8/Compose
Gedit should open, search for Khmer and make sure the following exists (if not, copy and paste it in):
#
# Khmer digraphs
#
<U17ff> : "ាំ"
<U17fe> : "ោះ"
<U17fd> : "េះ"
<U17fc> : "ុំ"
<U17fb> : "ុះ"
Save and reboot.
And everything works fine.