bash splits only the results of expansions on IFS, using POSIX.2 field splitting rules; sh splits all words on IFS sh does not allow MAILCHECK to be unset (?) sh does not allow traps on SIGALRM or SIGCHLD bash allows multiple option arguments when invoked (e.g. -x -v); sh allows...
tabs, multiple blanks and all — whereas (2) the unquoted version (echo $VARIABLE) replaces each sequence of one or more blanks, tabs and newlines with a single space.
IFS The Internal Field Separator that is used for word splitting after expansion and to split lines into words with the read builtin command. The default value is ''. IGNOREEOF Controls the action of an interactive shell on receipt of an EOF character as the sole input. If set, the value...
Some options like -k or -D require a string to follow the option letter. The string for that option is considered to end when a dollar sign ($) is found. For example, you can set two -D options on MS-DOS like this: LESS="Dn9.1$Ds4.1" If the --use-backslash option appears earl...
Using substr function in awk with variables Question: With the value of n being 4, the string "abcd" is echoed and passed as an argument to the awk command. Inside the awk command, the function named msdt_a1 is called with the arguments ($0, n, 1). ...
A great benefit of using Bash Arrays is to preserve field separation. Though, to keep that behavior, you must use double quotes as necessary. In absence of quoting, Bash will split the input into a list of words based on the $IFS value which by default contain spaces and tabs.[...
Those exceptional cases where you actually intend to split the stringSplitting $string on the separator $sep into $array:Bad (indirect pathname expansion):IFS="$sep" array=($string) Good:array=() while read -rd "$sep" i; do array+=("$i") done < <(printf '%s%s' "$string" "$sep...
The TIMEFORMAT variable may be set to a format string that spec- ifies how the timing information should be displayed; see the description of TIMEFORMAT under Shell Variables below. Each command in a pipeline is executed as a separate process (i.e., in a subshell). Lists A list is a ...
Duplicate: Adding double quotes while string concatenation in bash, Join several lines to create a string separated by a specific character, Joining Texts Using Explicit Tab and Line Break Characters
prompt string special char translation and variable expansion auto-export of variables in initial environment command search finds functions before builtins bash return builtin will exit a file sourced with `.' builtins: cd -/-L/-P, exec -l/-c/-a, echo -e/-E, hash -d/-l/-p/-t. ...