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982grep -G basic regular expressions
983grep -E extended regular expressions
984grep -F fixed strings
985grep -P Perl-compatible patterns
986grep -i case folding
987grep -v inverse selection
988grep -w word boundaries
989grep -x whole lines
990grep -o matching fragments
991grep -n line numbers
992grep -b byte offsets
993grep -c matching-line counts
994grep -l matching filenames
995grep -L nonmatching filenames
996grep -q quiet status
997grep -m maximum matches
998grep -A trailing context
999grep -B preceding context
1000grep -C surrounding context
1001grep -r versus -R symlink traversal
1002grep --include and --exclude
1003grep --exclude-dir
1004grep -f pattern files
1005grep -e multiple patterns
1006grep -z NUL-delimited records
1007grep -Z NUL-delimited filenames
1008grep binary-file policies
1009grep color controls
1010grep exit status 1 versus 2
1011grep locale-dependent matching
1012Regex anchors ^ and $
1013Regex dot and newline boundaries
1014Regex bracket ranges
1015Regex POSIX character classes
1016Regex alternation precedence
1017Regex grouping and capture numbering
1018Regex backreferences
1019Regex bounded repetition
1020Regex greedy quantifiers
1021PCRE lazy quantifiers
1022PCRE lookahead assertions
1023PCRE lookbehind constraints
1024PCRE noncapturing groups
1025PCRE word boundary semantics
1026PCRE Unicode properties
1027PCRE atomic groups
1028PCRE possessive quantifiers
1029Escaping BRE metacharacters
1030Escaping ERE metacharacters
1031Regex denial-of-service risks
1032sed pattern space lifecycle
1033sed automatic printing
1034sed -n explicit printing
1035sed -e multiple expressions
1036sed -f program files
1037sed -i backup suffixes
1038sed address by line number
1039sed address by regex
1040sed two-address ranges
1041sed relative address ranges
1042sed inverted addresses
1043sed first~step GNU addresses
1044sed braces for command grouping
1045sed s command delimiters
1046sed substitution numeric flags
1047sed substitution p flag
1048sed substitution w flag
1049sed substitution e execution risks
1050sed replacement ampersand
1051sed replacement backreferences
1052sed GNU case conversion escapes
1053sed transliteration y
1054sed d versus D
1055sed p versus P
1056sed n versus N
1057sed a append command
1058sed i insert command
1059sed c replace command
1060sed r reading files
1061sed w writing files
1062sed q versus Q
1063sed line-number command =
1064sed l escaped output
1065sed hold space h and H
1066sed hold retrieval g and G
1067sed x space exchange
1068sed labels and b branches
1069sed t conditional branch
1070sed T failed-substitution branch
1071sed multiline matching
1072sed sliding windows
1073sed paragraph processing
1074sed state machines
1075sed portability across GNU and BSD
1076sed -z NUL record mode
1077awk record and field model
1078awk BEGIN initialization
1079awk END finalization
1080awk pattern-action blocks
1081awk default actions
1082awk numeric versus string comparisons
1083awk truth conversions
1084awk FS regular expressions
1085awk OFS output separators
1086awk RS record separators
1087awk ORS output records
1088awk NF and dynamic field counts
1089awk NR versus FNR
1090awk FILENAME and ARGIND
1091awk assigning fields rebuilds records
1092awk getline return values
1093awk getline from files
1094awk getline from commands
1095awk closing streams
1096awk print versus printf
1097awk printf width and precision
1098awk arithmetic operators
1099awk increment and assignment
1100awk string concatenation
1101awk conditional expressions
1102awk if and switch portability
1103awk while and do loops
1104awk for loops
1105awk next versus nextfile
1106awk exit and END behavior
1107awk functions and local variables
1108awk recursion
1109awk associative subscripts
1110awk multidimensional SUBSEP keys
1111gawk arrays of arrays
1112awk delete entries and arrays
1113awk membership with in
1114awk split and patsplit
1115awk sub versus gsub
1116awk gensub return values
1117awk match and RSTART RLENGTH
1118awk substr and index
1119awk length on strings and arrays
1120awk tolower and toupper
1121awk sprintf formatting
1122awk strtonum base parsing
1123awk int and rounding
1124awk rand and srand
1125awk mktime and strftime
1126awk systime timestamps
1127awk system exit status
1128awk command-line -v variables
1129awk ENVIRON access
1130awk ARGV rewriting
1131awk redirection append versus truncate
1132awk two-file lookup joins
1133awk duplicate detection
1134awk grouped aggregation
1135awk moving averages
1136awk histogram construction
1137awk CSV parsing limitations
1138gawk FPAT field patterns
1139gawk FIELDWIDTHS fixed columns
1140gawk --csv support and versions
1141gawk PROCINFO sorted_in
1142gawk asort versus asorti
1143gawk coprocess pipes
1144gawk namespaces
1145gawk include files
1146gawk debugger
1147gawk profiling with --profile
1148awk locale effects
1149mawk versus gawk compatibility
1150sort -k key boundaries
1151sort -t field separators
1152sort -n numeric sorting
1153sort -g general numeric sorting
1154sort -h human sizes
1155sort -V version ordering
1156sort -M month names
1157sort -r reverse ordering
1158sort -s stable sorting
1159sort -u uniqueness by key
1160sort -c checking ordering
1161sort -m merging streams
1162sort -S memory budget
1163sort -T scratch directories
1164sort --parallel workers
1165sort -z NUL records
1166sort locale collation pitfalls
1167uniq requires adjacent duplicates
1168uniq -c occurrence counts
1169uniq -d repeated lines
1170uniq -u singleton lines
1171uniq -f skipping fields
1172uniq -s skipping characters
1173uniq -w comparison width
1174uniq -i case folding
1175uniq -z record delimiters
1176comm three-column output
1177comm suppressing columns
1178comm ordering prerequisites
1179join sorted input constraints
1180join -1 and -2 key fields
1181join -a outer joins
1182join -v unmatched rows
1183join -o output fields
1184join -e empty replacement
1185join -t delimiters
1186join duplicate-key multiplication
1187cut -b byte selection
1188cut -c character selection caveats
1189cut -f field selection
1190cut -d delimiter constraints
1191cut --complement
1192cut -s suppressing unseparated lines
1193cut --output-delimiter
1194paste parallel merging
1195paste -s serial merging
1196paste -d delimiter cycling
1197tr character set expansion
1198tr -d deletion
1199tr -s squeezing repeats
1200tr -c complements
1201tr locale and byte safety
1202tr octal escape handling
1203diff unified output
1204diff recursive trees
1205diff whitespace ignore policies
1206diff exit statuses
1207diff --label headers
1208diff --no-index alternatives
1209cmp first differing byte
1210cmp -l byte listings
1211patch dry runs
1212patch -p strip levels
1213patch reverse application
1214diff3 conflict markers
1215find starting points and traversal
1216find -name versus -iname
1217find -path versus -ipath
1218find -regex dialects
1219find -type file kinds
1220find -xtype symlink checks
1221find -size rounding rules
1222find -mtime day boundaries
1223find -mmin minute precision
1224find -atime access timestamps
1225find -ctime metadata timestamps
1226find -newer reference files
1227find -newermt literal dates
1228find -user and -uid
1229find -group and -gid
1230find -nouser and -nogroup
1231find -perm exact modes
1232find -perm all versus any bits
1233find -links link counts
1234find -inum inode selection
1235find -samefile references
1236find -empty tests
1237find -readable and access checks
1238find -maxdepth and -mindepth
1239find -depth postorder
1240find -prune excluding subtrees
1241find -xdev filesystem boundaries
1242find -L and -P symlink policy
1243find Boolean precedence
1244find parentheses and negation
1245find -print0 output
1246find -printf formatting
1247find -ls detailed listing
1248find -exec per match
1249find -exec batches with +
1250find -execdir safety
1251find -ok confirmation
1252find -delete ordering hazards
1253find -quit early exit
1254find race conditions
1255find -ignore_readdir_race
1256find optimization levels
1257xargs whitespace tokenization
1258xargs -0 NUL input
1259xargs -d custom delimiters
1260xargs -r empty-input behavior
1261xargs -n argument batching
1262xargs -s command-size limits
1263xargs -I replacement strings
1264xargs -L logical lines
1265xargs -P parallel execution
1266xargs -t tracing
1267xargs -p confirmation
1268xargs child exit handling
1269xargs shell positional placeholders
1270xargs SIGUSR concurrency adjustment
1271xargs versus find -exec +

982grep -G basic regular expressions
983grep -E extended regular expressions
984grep -F fixed strings
985grep -P Perl-compatible patterns
986grep -i case folding
987grep -v inverse selection
988grep -w word boundaries
989grep -x whole lines
990grep -o matching fragments
991grep -n line numbers
992grep -b byte offsets
993grep -c matching-line counts
994grep -l matching filenames
995grep -L nonmatching filenames
996grep -q quiet status
997grep -m maximum matches
998grep -A trailing context
999grep -B preceding context
1000grep -C surrounding context
1001grep -r versus -R symlink traversal
1002grep --include and --exclude
1003grep --exclude-dir
1004grep -f pattern files
1005grep -e multiple patterns
1006grep -z NUL-delimited records
1007grep -Z NUL-delimited filenames
1008grep binary-file policies
1009grep color controls
1010grep exit status 1 versus 2
1011grep locale-dependent matching
1012Regex anchors ^ and $
1013Regex dot and newline boundaries
1014Regex bracket ranges
1015Regex POSIX character classes
1016Regex alternation precedence
1017Regex grouping and capture numbering
1018Regex backreferences
1019Regex bounded repetition
1020Regex greedy quantifiers
1021PCRE lazy quantifiers
1022PCRE lookahead assertions
1023PCRE lookbehind constraints
1024PCRE noncapturing groups
1025PCRE word boundary semantics
1026PCRE Unicode properties
1027PCRE atomic groups
1028PCRE possessive quantifiers
1029Escaping BRE metacharacters
1030Escaping ERE metacharacters
1031Regex denial-of-service risks
1032sed pattern space lifecycle
1033sed automatic printing
1034sed -n explicit printing
1035sed -e multiple expressions
1036sed -f program files
1037sed -i backup suffixes
1038sed address by line number
1039sed address by regex
1040sed two-address ranges
1041sed relative address ranges
1042sed inverted addresses
1043sed first~step GNU addresses
1044sed braces for command grouping
1045sed s command delimiters
1046sed substitution numeric flags
1047sed substitution p flag
1048sed substitution w flag
1049sed substitution e execution risks
1050sed replacement ampersand
1051sed replacement backreferences
1052sed GNU case conversion escapes
1053sed transliteration y
1054sed d versus D
1055sed p versus P
1056sed n versus N
1057sed a append command
1058sed i insert command
1059sed c replace command
1060sed r reading files
1061sed w writing files
1062sed q versus Q
1063sed line-number command =
1064sed l escaped output
1065sed hold space h and H
1066sed hold retrieval g and G
1067sed x space exchange
1068sed labels and b branches
1069sed t conditional branch
1070sed T failed-substitution branch
1071sed multiline matching
1072sed sliding windows
1073sed paragraph processing
1074sed state machines
1075sed portability across GNU and BSD
1076sed -z NUL record mode
1077awk record and field model
1078awk BEGIN initialization
1079awk END finalization
1080awk pattern-action blocks
1081awk default actions
1082awk numeric versus string comparisons
1083awk truth conversions
1084awk FS regular expressions
1085awk OFS output separators
1086awk RS record separators
1087awk ORS output records
1088awk NF and dynamic field counts
1089awk NR versus FNR
1090awk FILENAME and ARGIND
1091awk assigning fields rebuilds records
1092awk getline return values
1093awk getline from files
1094awk getline from commands
1095awk closing streams
1096awk print versus printf
1097awk printf width and precision
1098awk arithmetic operators
1099awk increment and assignment
1100awk string concatenation
1101awk conditional expressions
1102awk if and switch portability
1103awk while and do loops
1104awk for loops
1105awk next versus nextfile
1106awk exit and END behavior
1107awk functions and local variables
1108awk recursion
1109awk associative subscripts
1110awk multidimensional SUBSEP keys
1111gawk arrays of arrays
1112awk delete entries and arrays
1113awk membership with in
1114awk split and patsplit
1115awk sub versus gsub
1116awk gensub return values
1117awk match and RSTART RLENGTH
1118awk substr and index
1119awk length on strings and arrays
1120awk tolower and toupper
1121awk sprintf formatting
1122awk strtonum base parsing
1123awk int and rounding
1124awk rand and srand
1125awk mktime and strftime
1126awk systime timestamps
1127awk system exit status
1128awk command-line -v variables
1129awk ENVIRON access
1130awk ARGV rewriting
1131awk redirection append versus truncate
1132awk two-file lookup joins
1133awk duplicate detection
1134awk grouped aggregation
1135awk moving averages
1136awk histogram construction
1137awk CSV parsing limitations
1138gawk FPAT field patterns
1139gawk FIELDWIDTHS fixed columns
1140gawk --csv support and versions
1141gawk PROCINFO sorted_in
1142gawk asort versus asorti
1143gawk coprocess pipes
1144gawk namespaces
1145gawk include files
1146gawk debugger
1147gawk profiling with --profile
1148awk locale effects
1149mawk versus gawk compatibility
1150sort -k key boundaries
1151sort -t field separators
1152sort -n numeric sorting
1153sort -g general numeric sorting
1154sort -h human sizes
1155sort -V version ordering
1156sort -M month names
1157sort -r reverse ordering
1158sort -s stable sorting
1159sort -u uniqueness by key
1160sort -c checking ordering
1161sort -m merging streams
1162sort -S memory budget
1163sort -T scratch directories
1164sort --parallel workers
1165sort -z NUL records
1166sort locale collation pitfalls
1167uniq requires adjacent duplicates
1168uniq -c occurrence counts
1169uniq -d repeated lines
1170uniq -u singleton lines
1171uniq -f skipping fields
1172uniq -s skipping characters
1173uniq -w comparison width
1174uniq -i case folding
1175uniq -z record delimiters
1176comm three-column output
1177comm suppressing columns
1178comm ordering prerequisites
1179join sorted input constraints
1180join -1 and -2 key fields
1181join -a outer joins
1182join -v unmatched rows
1183join -o output fields
1184join -e empty replacement
1185join -t delimiters
1186join duplicate-key multiplication
1187cut -b byte selection
1188cut -c character selection caveats
1189cut -f field selection
1190cut -d delimiter constraints
1191cut --complement
1192cut -s suppressing unseparated lines
1193cut --output-delimiter
1194paste parallel merging
1195paste -s serial merging
1196paste -d delimiter cycling
1197tr character set expansion
1198tr -d deletion
1199tr -s squeezing repeats
1200tr -c complements
1201tr locale and byte safety
1202tr octal escape handling
1203diff unified output
1204diff recursive trees
1205diff whitespace ignore policies
1206diff exit statuses
1207diff --label headers
1208diff --no-index alternatives
1209cmp first differing byte
1210cmp -l byte listings
1211patch dry runs
1212patch -p strip levels
1213patch reverse application
1214diff3 conflict markers
1215find starting points and traversal
1216find -name versus -iname
1217find -path versus -ipath
1218find -regex dialects
1219find -type file kinds
1220find -xtype symlink checks
1221find -size rounding rules
1222find -mtime day boundaries
1223find -mmin minute precision
1224find -atime access timestamps
1225find -ctime metadata timestamps
1226find -newer reference files
1227find -newermt literal dates
1228find -user and -uid
1229find -group and -gid
1230find -nouser and -nogroup
1231find -perm exact modes
1232find -perm all versus any bits
1233find -links link counts
1234find -inum inode selection
1235find -samefile references
1236find -empty tests
1237find -readable and access checks
1238find -maxdepth and -mindepth
1239find -depth postorder
1240find -prune excluding subtrees
1241find -xdev filesystem boundaries
1242find -L and -P symlink policy
1243find Boolean precedence
1244find parentheses and negation
1245find -print0 output
1246find -printf formatting
1247find -ls detailed listing
1248find -exec per match
1249find -exec batches with +
1250find -execdir safety
1251find -ok confirmation
1252find -delete ordering hazards
1253find -quit early exit
1254find race conditions
1255find -ignore_readdir_race
1256find optimization levels
1257xargs whitespace tokenization
1258xargs -0 NUL input
1259xargs -d custom delimiters
1260xargs -r empty-input behavior
1261xargs -n argument batching
1262xargs -s command-size limits
1263xargs -I replacement strings
1264xargs -L logical lines
1265xargs -P parallel execution
1266xargs -t tracing
1267xargs -p confirmation
1268xargs child exit handling
1269xargs shell positional placeholders
1270xargs SIGUSR concurrency adjustment
1271xargs versus find -exec +

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grep -P Perl-compatible patterns

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