Permission denied at hdfs
I solved this problem temporary by disabling the dfs permission.By adding below property code to conf/hdfs-site.xml <property> <name>dfs.permissions</name> <value>false</value> </property>
shell
How do I reload ZSH config files without replacing the current shell?
Usually a source ~/.zshrc should do it.
${BASH_SOURCE[0]} equivalent in zsh?
${BASH_SOURCE[0]} equivalent in zsh is ${(%):-%N}, NOT $0(as OP said, the latter failed in .zshrc) Here % indicates prompt expansion on the value, %N indicates “The name of the script, sourced file, or shell function that zsh is currently executing, whichever was started most recently. If there is none, this is equivalent to the parameter … Read more
How can I negate the return-value of a process?
Previously, the answer was presented with what’s now the first section as the last section. POSIX Shell includes a ! operator Poking around the shell specification for other issues, I recently (September 2015) noticed that the POSIX shell supports a ! operator. For example, it is listed as a reserved word and can appear at … Read more
Can I call a function of a shell script from another shell script?
Refactor your second.sh script like this: func1 { fun=”$1″ book=”$2″ printf “func=%s,book=%s\n” “$fun” “$book” } func2 { fun2=”$1″ book2=”$2″ printf “func2=%s,book2=%s\n” “$fun2” “$book2” } And then call these functions from script first.sh like this: source ./second.sh func1 love horror func2 ball mystery OUTPUT: func=love,book=horror func2=ball,book2=mystery
xargs split at newlines not spaces
Try: printf %b ‘ac s\nbc s\ncc s\n’ | xargs -d ‘\n’ bash /tmp/test.sh You neglected to quote the \n passed to -d, which means that just n rather than \n was passed to xargs as the delimiter – the shell “ate” the \ (when the shell parses an unquoted string, \ functions as an escape … Read more
How to add timestamp to STDERR redirection
If you’re talking about an up-to-date timestamp on each line, that’s something you’d probably want to do in your actual script (but see below for a nifty solution if you have no power to change it). If you just want a marker date on its own line before your script starts writing, I’d use: ( … Read more
How can I delete a file only if it exists?
Pass the -f argument to rm, which will cause it to treat the situation where the named file does not exist as success, and will suppress any error message in that case: rm -f — filename.log What you literally asked for would be more like: [ -e filename.log ] && rm — filename.log but it’s … Read more
Why does wget ignore the query string in the URL?
& is a special character in most shell environments. You can use double quotes to quote the URL to pass the whole thing in as the parameter to wget: wget “http://www.ted.com/talks/quick-list?sort=date&order=desc&page=18”