I think it is easier to use pgrep $ pgrep bluetoothd 441 Otherwise, you can use awk: ps -ef | awk ‘$8==”name_of_process” {print $2}’ For example, if ps -efhas a line like: root 441 1 0 10:02 ? 00:00:00 /usr/sbin/bluetoothd Then ps -ef | awk ‘$8==”/usr/sbin/bluetoothd” {print $2}’ returns 441. In ksh pgrep is not … Read more
Use the tee command: echo “hello” | tee logfile.txt
“Unfortunately this seems to only check the current directory, not the entire folder”. Presumably you mean it doesn’t look in subdirectories. To fix this, use find -name “filename” If the file in question is not in the current working directory, you can search your entire machine via find / -name “filename” This also works with … Read more
Usage of the $ like ${HOME} gives the value of HOME. Usage of the $ like $(echo foo) means run whatever is inside the parentheses in a subshell and return that as the value. In my example, you would get foo since echo will write foo to standard out
Use -F [field separator] to split the lines on “s: awk -F ‘”‘ ‘{print $2}’ your_input_file or for input from pipe <some_command> | awk -F ‘”‘ ‘{print $2}’ output: A B C D
You might want to look at the uniq and sort applications. ./yourscript.ksh | sort | uniq (FYI, yes, the sort is necessary in this command line, uniq only strips duplicate lines that are immediately after each other) EDIT: Contrary to what has been posted by Aaron Digulla in relation to uniq‘s commandline options: Given the … Read more
Robust solutions for bash, ksh, zsh, including a cross-shell one, plus a reasonably robust POSIX-compliant solution: Version numbers given are the ones on which functionality was verified – likely, these solutions work on much earlier versions, too – feedback welcome. Using POSIX features only (such as in dash, which acts as /bin/sh on Ubuntu), there … Read more
The backticks/gravemarks have been deprecated in favor of $() for command substitution because $() can easily nest within itself as in $(echo foo$(echo bar)). There are other differences such as how backslashes are parsed in the backtick/gravemark version, etc. See BashFAQ/082 for several reasons to always prefer the $(…) syntax. Also see the POSIX spec … Read more
Try mkdir -p: mkdir -p foo Note that this will also create any intermediate directories that don’t exist; for instance, mkdir -p foo/bar/baz will create directories foo, foo/bar, and foo/bar/baz if they don’t exist. Some implementation like GNU mkdir include mkdir –parents as a more readable alias, but this is not specified in POSIX/Single Unix … Read more